This project aims to completely reverse engineer Metal Gear Solid Integral for PlayStation back to C source code which when compiled produces the same assembly code.
At this moment SLPM_862.47/SLPM_862.48/SLPM_862.49 main executables are 100% decompiled. However, even though this is a substantial milestone, a significant amount of work
is still left to decompile overlays - making it possible to boot into every game level and clean up already decompiled code.
The repository builds or aims to build the following artifacts:
SLPM_862.47 (main executable)
Status ✔️ 100% decompiled! The next goals for this artifact are to clean up the decompiled code, find cleaner matches and make it shiftable.
Size 626 KB
SHA256 4b8252b65953a02021486406cfcdca1c7670d1d1a8f3cf6e750ef6e360dc3a2f
Building python build.py
SLPM_862.48 (main executable)
Status ✔️ 100% decompiled! Identical to SLPM_862.47 (main executable).
Size
SHA256
Building
SLPM_862.49 (main executable)
Status ✔️ 100% decompiled! This executable is based on SLPM_862.47 (main executable), but with many small changes, especially around chara/snake_vr (a variant of Snake actor).
Size 616 KB
SHA256 c370f8e41ec8fb78238bfe2ddbfc25a6d37ec8f0972c86ebfde075ecd4ee8dca
Building python build.py --variant=vr_exe
Metal Gear Solid Integral dynamically loads additional per-stage executable code that is required to play a particular stage of the game. The main executable contains the game engine, as well as the most common actors used throughout the stages.
Overlays on SLPM-86247
Status 🚧 Work in progress.
Click to expand
abst 46 KB
Abstract (Save/Load Menu)
❌ Work not started
brf 125 KB
Briefing
❌ Work not started
camera 54 KB
JPEG Photo Menu
🚧 Work in progress
change 12 KB
Disc Change
✔️ 100% decompiled!
d00a 122 KB
Loading Dock (Cutscene)
✔️ 100% decompiled!
d01a 57 KB
Heliport (Cutscene)
✔️ 100% decompiled!
d03a 18 KB
Holding Cell (Cutscene)
✔️ 100% decompiled!
d11c 14 KB
Communication Tower B (Cutscene)
✔️ 100% decompiled!
d16e 65 KB
Underground Base (Cutscene)
✔️ 100% decompiled!
d18a 96 KB
Supply Route (Cutscene)
🚧 Work in progress
d18ar 96 KB
Supply Route (Cutscene) (RED)
🚧 Work in progress
demosel 16 KB
Demo Theater
✔️ 100% decompiled!
ending 40 KB
Ending Demo (SCENE 28-1)
✔️ 100% decompiled!
endingr 40 KB
Ending Demo (SCENE 28-1) (RED)
✔️ 100% decompiled!
opening 42 KB
Opening Demo (SCENE 01-1)
✔️ 100% decompiled!
option 26 KB
Options Menu
🚧 Work in progress
preope 25 KB
Previous Operations
✔️ 100% decompiled!
rank 139 KB
Ranking Screen
❌ Work not started
roll 39 KB
Staff Roll
✔️ 100% decompiled!
s00a 120 KB
Loading Dock
✔️ 100% decompiled!
s01a 137 KB
Heliport
✔️ 100% decompiled!
s02a 130 KB
Tank Hangar
✔️ 100% decompiled!
s02b 129 KB
Tank Hangar
✔️ 100% decompiled!
s02c 132 KB
Tank Hangar (Before Contacting Meryl)
✔️ 100% decompiled!
s02d 126 KB
Tank Hangar (After Contacting Meryl)
✔️ 100% decompiled!
s02e 132 KB
Tank Hangar (After Torture)
✔️ 100% decompiled!
s03a 75 KB
Holding Cell
✔️ 100% decompiled!
s03ar 75 KB
Holding Cell (RED)
✔️ 100% decompiled!
s03b 66 KB
Medical Room
✔️ 100% decompiled!
s03c 84 KB
Medical Room
🚧 Work in progress
s03d 101 KB
Holding Cell
❌ Work not started
s03dr 101 KB
Holding Cell (RED)
❌ Work not started
s03e 38 KB
Holding Cell (vs. Soldiers)
✔️ 100% decompiled!
s03er 38 KB
Holding Cell (vs. Soldiers) (RED)
✔️ 100% decompiled!
s04a 94 KB
Armory
✔️ 100% decompiled!
s04b 116 KB
Armory South (vs. Ocelot)
❌ Work not started
s04br 116 KB
Armory South (vs. Ocelot) (RED)
❌ Work not started
s04c 100 KB
Armory South
🚧 Work in progress
s05a 130 KB
Canyon
❌ Work not started
s06a 127 KB
Warhead Storage Building 1F
✔️ 100% decompiled!
s07a 130 KB
Warhead Storage Building B1
✔️ 100% decompiled!
s07b 141 KB
Commander's Room
❌ Work not started
s07br 141 KB
Commander's Room (RED)
❌ Work not started
s07c 73 KB
Warhead Storage Building B1
🚧 Work in progress
s07cr 73 KB
Warhead Storage Building B1 (RED)
🚧 Work in progress
s08a 86 KB
Warhead Storage Building B2
🚧 Work in progress
s08b 133 KB
Laboratory
🚧 Work in progress
s08br 133 KB
Laboratory (RED)
🚧 Work in progress
s08c 60 KB
Corridor
✔️ 100% decompiled!
s08cr 60 KB
Corridor (RED)
✔️ 100% decompiled!
s09a 121 KB
Caves
❌ Work not started
s09ar 121 KB
Caves (RED)
❌ Work not started
s10a 135 KB
Underground Passage
❌ Work not started
s10ar 135 KB
Underground Passage (RED)
❌ Work not started
s11a 87 KB
Communication Tower A
❌ Work not started
s11b 97 KB
Communication Tower Roof
❌ Work not started
s11c 65 KB
Communication Tower B
✔️ 100% decompiled!
s11d 60 KB
Communication Tower A Wall
🚧 Work in progress
s11e 113 KB
Communication Tower B Elevator
✔️ 100% decompiled!
s11g 105 KB
Communication Tower B Roof
🚧 Work in progress
s11h 97 KB
Communication Tower B Roof (vs. Hind D)
❌ Work not started
s11i 75 KB
Communication Tower Walkway
🚧 Work in progress
s12a 107 KB
Snowfield
🚧 Work in progress
s12b 96 KB
Snowfield (After vs. Sniper Wolf)
❌ Work not started
s12c 95 KB
Snowfield (After vs. Sniper Wolf)
🚧 Work in progress
s13a 130 KB
Blast Furnace
✔️ 100% decompiled!
s14e 108 KB
Cargo Elevator
❌ Work not started
s15a 89 KB
Warehouse
❌ Work not started
s15b 38 KB
Warehouse North
✔️ 100% decompiled!
s15c 129 KB
Warehouse
🚧 Work in progress
s16a 63 KB
Underground Base (1F)
✔️ 100% decompiled!
s16b 10 KB
Underground Base (2F)
✔️ 100% decompiled!
s16c 109 KB
Underground Base (3F)
✔️ 100% decompiled!
s16d 121 KB
Underground Base (Control Room)
✔️ 100% decompiled!
s17a 140 KB
Supply Route (vs. REX)
❌ Work not started
s17ar 140 KB
Supply Route (vs. REX) (RED)
❌ Work not started
s18a 133 KB
Supply Route (vs. Liquid)
❌ Work not started
s18ar 133 KB
Supply Route (vs. Liquid) (RED)
❌ Work not started
s19a 120 KB
Escape Route (Garage)
❌ Work not started
s19ar 120 KB
Escape Route (Garage) (RED)
❌ Work not started
s19b 110 KB
Escape Route (Tunnel)
🚧 Work in progress
s19br 110 KB
Escape Route (Tunnel) (RED)
🚧 Work in progress
s20a 30 KB
Ending Demo (SCENE 28-1)
✔️ 100% decompiled!
s20ar 30 KB
Ending Demo (SCENE 28-1) (RED)
✔️ 100% decompiled!
select 8 KB
Debug Menu
✔️ 100% decompiled!
select1 721 B
Debug Menu Stage Select (s00a-s04c)
✔️ 100% decompiled!
select2 721 B
Debug Menu Stage Select (s05a-s09a)
✔️ 100% decompiled!
select3 721 B
Debug Menu Stage Select (s10a-s14e)
✔️ 100% decompiled!
select4 721 B
Debug Menu Stage Select (s15a-s20a)
✔️ 100% decompiled!
selectd 721 B
Debug Menu Demo Select
✔️ 100% decompiled!
sound 1 KB
Debug Menu Sound Test
✔️ 100% decompiled!
title 89 KB
Title Screen
🚧 Work in progress
Individual overlay SHA256:
Click to expand
abst.bin aed6a6145201850156d251618561487456e1b02d7ce26a40cf1e492b6fa30ec0
brf.bin 95f948d72f4b2dd523c3f60b3e036db2971c5f00b3f69d7dc9b4744c48996286
camera.bin 7e1738af3c3987b5461773cf865da803bac48820000e0e916307f29fa836f388
change.bin d2f0afa4861278774ecc818c19e31420e3b05e96da4313ea048451bfabf780e5
d00a.bin 3dd07b291d5bc6b58a028d012b744d9d2c8023f143474467b0259e5a5603ad0a
d01a.bin 3a8d292f250a80b708a06f3fd41ee0e6b74733390084ef5b163108ba5c8af4a1
d03a.bin 3f3b4350dc263a088c70fa7518844ba8e5ec95a3f705ffbc5a37e6b5ff18f8b1
d11c.bin 86edb16ecdb7319d0ad133687228a808170a50ce36f393c96678f8379c48c746
d16e.bin bf5ab697b6d0415ba63b9aa3aaba28f387f324cd2f1b32eb46f5d3cb253e48ef
d18a.bin c388e19be2811a05075a0da664b5b4264040ecd7e2f6eb6cd761d8e579c35103
d18ar.bin df7d5353a7b3be3d6d0f2550179181de27538c41b65b900c7f4a90068ee9d18a
demosel.bin bbf6a776efcc2631b982f920f2c9247c8b215dd7a1358b3b9f9d76484f7d43d9
ending.bin 321c325577bb05cf68bec689083cbc9f7fc4d0b634776c1e6cad1f464ffb1da3
endingr.bin c8eabac0fa0bde6d7bbbdba97a4b8948c3e6a0c839d2b438705345c392b43c35
opening.bin 87a5e822f5b428376ad36fcd28ebc56f661cf340f0ea059f11489b5f24e85545
option.bin 19e897b855f2e197e62160a8a409d2ff57a6b8588b831722fab9c3aaca324ea0
preope.bin 3176b630b8a3f9d8cb01ed833d78fbe654054a576c1f2da0ed91007dd71bd136
rank.bin 6a5ed242f966a4c60bba7daf9a2ba1c37482825d0786e1d77476e135030753f5
roll.bin dfe3ca728b6e409613ef7a3dc11b48ecaa236d8ba6cd0951ce4321329842beae
s00a.bin 533cb8e9b6ffdcc442c25ba51eb3d83e90cb1ad2831d3870395333398c8402bc
s01a.bin 534f8365ad37dbb5c4753bd1720517fa4d1a92e9008597064e6b30a23dc00a75
s02a.bin ece10d39e1d5bafee5acb4dd970bf83801128b04e4fb24ad31756e5bb4ca754d
s02b.bin 57a66e93a2028e3fb805c97c585fb6cfb5fe76c93fc4b8495ccdb2c03a1de308
s02c.bin 7c0b12187840f60405970364a1f7c73ec96be32c1130b3f9a87ec58f6ea46915
s02d.bin 5fe851426faf64733c1077998f9463b5455c766d3e27c9cdceed38ac338e8542
s02e.bin cd79cd79a00e18bd5d323b0b8e153b4e8fe5548b6e0ea68f36d13f190eca0477
s03a.bin c42bba970bdc968ee48b572efb03c41f15869cfc00d6aa0d7c8106487534f580
s03ar.bin f34b46313625005b6aef5006b184556c4dd8f13e97a3b0c346f0f4fc7b9fbf04
s03b.bin cd728e144c960e7419d389c81802d3de73c00a2f31e9bfd7eea33ed3ed2be083
s03c.bin cc3b95638684f6f0a6cbcf9b0436fbc7b545ca0eeb0e6e60d6c4d0646dbc7fb4
s03d.bin f9fa0f39352d3305b5cb2bd6c292297d4f351387b0038a27ccec29f42150d903
s03dr.bin fa785a857655809ccf984d8c8ada626addbadfd11db31b34ef496ddce225ade1
s03e.bin af0e15b223431977c2ad233596c37a51c0367da6470c1b760d3f211eb82e894c
s03er.bin b1e60c25c0ee92e8c347b7f6a51b2e3fdb10d9ea33a2a77e1acbd8bfc7367114
s04a.bin 59b541a13b987478d6717643c3c146018b070fe374ffae0eaaf3f9a8bdc2ffb6
s04b.bin bca0c362260565051a8d41ffc49d3b9ae84d1bc9dc758164ea019cae82de7fa7
s04br.bin 3ceb35994af2c7da7955ab356cbbb7471c749ff6788ecdfbffab1c5679bb4f9b
s04c.bin 5e6bc0c9b13f009c69c2ebdfb401fe9d55a6cd6ee8610cbdd95ee9f3dd71f32a
s05a.bin fd08923d1e1ad01b8638f7e8f4a101e270a5f399f3d1afed47abca7532a8c081
s06a.bin 766d25f927a1116d565f97479786a42b93a275398310f775304668ec191a47e7
s07a.bin 20cb960a5d97e0b60c030ed0c17eea78bf6d7e0f5dc50945828e8c2106612546
s07b.bin bbe527b3883ad7c41e4999a8b1d49e64265100b7d8ff6a7724e3fce5d6fb7328
s07br.bin 04007a426525216049196b550e22fc0e922c75f78c6fcfc4b469f9d5defbbc47
s07c.bin 03904064a3d2d2bcd83f719cf7de0d780886ebeae5645dcc7e345acd7fe8cba1
s07cr.bin e3c3503599693be3d3729e0bfc09d364de85b46520eff3909b822a14a7dadfbd
s08a.bin 56a0d3aa551dd6eefda902497c3f0a90c458b4ab0a54b9a63b7fe3298606d4c9
s08b.bin 21c5534dd17e5579404b2b0b2f3c47fb324b27a363a108669e3818a3dee15ded
s08br.bin 064e8dbb2af7589a7122f02a51e202d43fd3e9bf05aa18258c5cd88621a2d69c
s08c.bin 5badd1f304a57a3e55af6d5fe15694c51398c602779a31ee2b7276ad9f9aafbb
s08cr.bin 1521588d917c0558839f915191ed5b643fba37a7d1fa4dc228951b433e1070c9
s09a.bin 4c698b375890c793c3622d410bffab7db48c01cfff393f458cd5712e316a7177
s09ar.bin 362fbe4c139197907498e38a1f56e403fe39b4a0217d34bfcf49cf86e86cb76b
s10a.bin 95f9cb0d5def5f30bb2133c0452b3aa49438f56c95535178d61eb11a03bb2e6e
s10ar.bin 465959ab31568740a4bf30bf0958865e485e48538e449a6b3c696c5fd7d52f69
s11a.bin 70be6cf00267ed663e29ce6b9598396e8fb7c60024b76ff86508244c56d39bf6
s11b.bin 280920ec9559d0c836bab8995de902f227759bb7430025a650f7c20633889f51
s11c.bin e49fbd3c76f8137fe4414699c7816143ea6c83c3dd1f8c44db9f1bd007e5ceec
s11d.bin b7e8487718b1c3dd835b3b71b785acc367469f5c84e7834d2b91518dc17da21e
s11e.bin 8400e639567b380f28320ccfc5d624b6aa16f8dafa80fdc212976ab386014a9a
s11g.bin 60c1e1882b4d9df99478a117a9bfb0d20eb58f4f37305aa46bb1658cf2761eb7
s11h.bin de8b36f6bdeb9871b28bf53c2fd13f3f53d836cadcf26fe735358e42151a478b
s11i.bin 706e9fa4b2b2288b6967cc0e519a109f0d2fd6da01dc190996f331b28e3f57e9
s12a.bin e99681d93e10f8cb1fd9fa0ae694bb1f5a517b18a42f8791d0df58feccdd2e1d
s12b.bin 7f7e125ea50101399608c859611515df3fb6f04c87ccfdcb10521d86a5aff71a
s12c.bin 3e22cf0791fffbef348149ba97e65b9d147488cb45992a1dd84e343414948cf1
s13a.bin 3af85549577319540e53c789f8a20fd10d8b080f74b309a3c6e966b453b75544
s14e.bin 0ad69a93f9aadf2e7b0b254cf6d39ad16c118d0af9686609b9df8ebcbed8986a
s15a.bin ab3bf00937e226119c4649e9aa5db7f24e4aab844cb550c752bc3ce1a06f735e
s15b.bin 5ab64d6c10801c11b0f672cbb4e68ab62ef1bf058944f5c3d32dbd073e3c8501
s15c.bin 7a6d398f600f359a04b8d9fcb7c006fdc888f4fcbdffd761e09ef4a932195483
s16a.bin 1bec05b1d61f2f5b6abffa1903abcea0ab9e5f4ddebb88ac64506c81548e6ccb
s16b.bin 811a2aa5d5cd7ba8673f3ca9cc3a89f07c8ac9e1f3f5843fed311557ebc0b9f6
s16c.bin 8217a2be487140af5bbded5f0dc37ab8cabedaf9af99d16256650ce27a8a5b50
s16d.bin c37c642eb06d7ec39364e4a1fac17e606804eee229e047102d4a2e93346e773f
s17a.bin a6b691ff0be4af526fb856847be0549dbe015b31b7fb137a1fbbe6027125d4d1
s17ar.bin a6b691ff0be4af526fb856847be0549dbe015b31b7fb137a1fbbe6027125d4d1
s18a.bin 4f605b802aef5c69ce4cc875165d41139acde9af1e9fdf419d0e4cee2bc7087e
s18ar.bin 17d33d059f09a7470b2e6f44efc2469f52f7ff74093542ffb4cdf52a5aa6c79d
s19a.bin 48390084a9a716bef980627c57df1867763a6502ad5109d2a6b3712e652840d7
s19ar.bin ef64d5fdb5e8285116ee2f8c693bc20f9af802dc6c16996f815d8823127352e6
s19b.bin d757942aca5d36ab95741801de1f68526c3a8e128018814f25655b7d72a7c249
s19br.bin 3d2d7c04d13dd3f55a97348f74eaf891615cfa203812d15494b53f9e570fe2bd
s20a.bin d14fdf0f3b5c98f72fd9f24fd119cdf88660528930ec784dc3d021b92e796925
s20ar.bin 4d6fee8a574d6b900eadff3925f2a38516c2d28784d6e38444ce6c9ece46e104
select.bin 10350d22ceb73b58224a2da9cc71a87380415e304b4c161a787b491162636bc9
select1.bin 6b101068fb3d41d9d634256f21cb094e13f331ed9fbbdb271be2a01ec631c145
select2.bin 6b101068fb3d41d9d634256f21cb094e13f331ed9fbbdb271be2a01ec631c145
select3.bin 6b101068fb3d41d9d634256f21cb094e13f331ed9fbbdb271be2a01ec631c145
select4.bin 6b101068fb3d41d9d634256f21cb094e13f331ed9fbbdb271be2a01ec631c145
selectd.bin 6b101068fb3d41d9d634256f21cb094e13f331ed9fbbdb271be2a01ec631c145
sound.bin 4173d0fcbc7bfcd477d2e0fa6810b509bf6392efb01fd58a7fa114f003849816
title.bin fb97721e30fd55cf6251e446d6e7d38e951049ec4703301da7fef7fe9c1afa6b
Overlays on SLPM-86248
Status Identical to SLPM-86247 overlays.
Overlays on SLPM-86249
Status ❌ Work not yet started.
Click to expand
camera 54 KB
JPEG Photo Menu
❌ Work not started
movie 120 KB
Extras Menu
❌ Work not started
opening 26 KB
Opening Movie
❌ Work not started
option 24 KB
Options Menu
❌ Work not started
photo_m1 77 KB
Photo Mode: Mei-Ling (Unused)
❌ Work not started
photo_m2 77 KB
Photo Mode: Mei-Ling
❌ Work not started
photo_n1 65 KB
Photo Mode: Naomi (Unused)
❌ Work not started
photo_n2 65 KB
Photo Mode: Naomi 1
❌ Work not started
photo_n3 63 KB
Photo Mode: Naomi 2
❌ Work not started
select 9 KB
Debug Menu
❌ Work not started
selectvr 137 KB
VR Missions Menu
❌ Work not started
sound 2 KB
Debug Menu Sound Test
❌ Work not started
vab_cfr 132 KB
1 Min. Battle vs. Target: C-4
❌ Work not started
vab_clm 132 KB
1 Min. Battle vs. Target: Claymore
❌ Work not started
vab_fms 132 KB
1 Min. Battle vs. Target: FA-MAS
❌ Work not started
vab_grn 139 KB
1 Min. Battle vs. Target: Grenade
❌ Work not started
vab_nkt 136 KB
1 Min. Battle vs. Target: Nikita
❌ Work not started
vab_psg 132 KB
1 Min. Battle vs. Target: PSG-1
❌ Work not started
vab_scm 135 KB
1 Min. Battle vs. Target: SOCOM
❌ Work not started
vab_stg 132 KB
1 Min. Battle vs. Target: Stinger
❌ Work not started
vab_sud 136 KB
1 Min. Battle vs. Target: No Weapon
❌ Work not started
vcd_n01 151 KB
Ninja Level 01
❌ Work not started
vcd_n02 148 KB
Ninja Level 02
❌ Work not started
vcd_n03 149 KB
Ninja Level 03
❌ Work not started
vcd_n04 79 KB
Variety Level 11: "The Truth is Over There"
❌ Work not started
vcd_n05 122 KB
Variety Level 12: "Genetic Monster Genola"
❌ Work not started
vcd_n06 74 KB
Variety Level 09
❌ Work not started
vefgh_01 142 KB
Puzzle Level 04
❌ Work not started
vefgh_02 139 KB
Puzzle Level 05
❌ Work not started
vefgh_03 141 KB
Variety Level 07
❌ Work not started
vefgh_04 149 KB
Puzzle Level 06
❌ Work not started
vefgh_05 152 KB
Puzzle Level 07
❌ Work not started
vefgh_06 146 KB
Variety Level 08
❌ Work not started
vefgh_07 145 KB
Puzzle Level 08
❌ Work not started
vefgh_08 146 KB
Puzzle Level 09
❌ Work not started
vefgh_09 145 KB
Puzzle Level 10
❌ Work not started
vefgh_10 137 KB
Mystery Level 10
❌ Work not started
vijkl_01 127 KB
VR Mission Stage 01
❌ Work not started
vijkl_02 134 KB
VR Mission Stage 04
❌ Work not started
vijkl_03 133 KB
VR Mission Stage 02
❌ Work not started
vijkl_04 140 KB
VR Mission Stage 03
❌ Work not started
vijkl_05 140 KB
VR Mission Stage 05
❌ Work not started
vijkl_06 138 KB
VR Mission Stage 06
❌ Work not started
vijkl_07 142 KB
VR Mission Stage 07
❌ Work not started
vijkl_08 128 KB
VR Mission Stage 08
❌ Work not started
vijkl_09 128 KB
VR Mission Stage 09
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Individual overlay SHA256:
Click to expand
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dev variant is a build variant that makes it easy to run the built game from mgs_reversing and test your own changes. Most notably it embeds some overlay files into the main executable to make it easier to load the game into an emulator.
mgs_reversing also provides a helper script run.py that starts the built game in PCSX-Redux emulator . Whenever you rebuild a game, this script will relaunch the emulator and you'll be able to see the changes you made.
Install Python3 if you haven't and make sure it's in your PATH. If you are on Linux, install Wine.
git clone https://github.com/FoxdieTeam/psyq_sdk.gitgit clone https://github.com/FoxdieTeam/mgs_reversing.gitcd mgs_reversing/build/pip3 install -r requirements.txtpython3 build.py --variant=dev_exepython3 run.py --iso ISO --pcsx-redux PCSX-REDUX-PATH
ISO is a path to ISO/ECM/BIN file with the original game (SLPM-86247).PCSX-REDUX-PATH is a path to a directory with downloaded PCSX-Redux emulator .
You should run this command in a separate command prompt. While this command is running, you can rebuild the game (with python3 build.py --variant=dev_exe) and the tool will automatically relaunch the emulator with the latest build.
Matching builds (main executable, VR executable)
Install Python3 if you haven't and make sure it's in your PATH. If you are on Linux, install Wine.
git clone https://github.com/FoxdieTeam/psyq_sdk.gitgit clone https://github.com/FoxdieTeam/mgs_reversing.gitcd mgs_reversing/build/pip3 install -r requirements.txtpython3 build.py
or python3 build.py --variant=vr_exe for VR executable
At the end you should see a message confirming that the built binary's hash matches the original game's binary's hash. If your code caused the compiler to emit warnings, try to fix them without breaking the match.
How to use the built (matching) executables Once you have successfully built the executables from the source code, you may want to play it to debug or test the changes you have made. Please keep in mind that if the size of the main executable changes or addresses shift, the original overlays won't work properly. This guide does not describe how to repackage overlays (a packer tool is planned for the future).
For how to use the dev variant, please see the build instructions above.
PCSX-Redux emulator provides a convenient way to load a modified main executable. Once you have loaded the original image of Metal Gear Solid: Integral you can load a modified executable in "File > Load binary" menu. This repository contains some helper Lua scripts that can be used with PCSX-Redux in build/pcsx-redux_scripts folder.
Other emulators - rebuilding ISO To rebuild an ISO with your modified executable, you need a tool called mkpsxiso : download and extract it to a folder of your choice.
Next, you need the original files of Metal Gear Solid: Integral from the CD-ROMs. If you have dumped the discs into .bin/.cue pairs, you need to unpack them into a folder using mkpsxiso. The following commands show how to do this for the first disc, but the same applies to the other two.
Open a terminal, cd into a folder of your choice and run the following command:
<mkpsxiso_folder_path>\bin\dumpsxiso.exe <path\to\mgsi_d1.bin> -x MGSI_D1 -s mgsi_d1.xml
This will create a folder named MGSI_D1 (containing the files of the first disc of the game), and an additional file, mgsi_d1.xml.
Open mgsi_d1.xml and replace
<file name =" SLPM_862.47" source =" MGSI_D1/MGS/SLPM_862.47" type =" data" with
<file name =" SLPM_862.47" source =" <path/to/_mgsi.exe>" type =" data" where _mgsi.exe is the output of the build process.
Optionally, you can also edit the attributes image_name and cue_sheet of the iso_project element to give them more appropriate values, like mgsi_d1.bin and mgsi_d1.cue, which are the output files of the next step.
Finally, run
<mkpsxiso_folder_path>\bin\mkpsxiso.exe mgsi_d1.xml
to re-pack the MGSI_D1 folder into a .bin/.cue pair that now contains the new executable instead of the original one. From now on, this is the only command to be executed every time you want to test a different version of the executable.
Now you are ready to play the game with your favorite emulator by starting the file mgsi_d1.cue.
How to decompile a function The asm/overlays directory contains functions that are not yet decompiled. As a starting point you could try finding a small function (small .s file) and try to decompile that function.
We make extensive use of decomp.me , which has a Metal Gear Solid (overlays) preset, to help match functions.
Before decompiling a new function, we highly recommend playing around with some functions already decompiled - see recent scratches here .
Before working on a function, search for it on the website and if you don't find it, go to the build folder and run python decompme_asm.py [path to .s file] to have the assembly instructions in your clipboard ready to paste into a new decomp.me scratch. Since there is a lot of duplication in overlays, make sure that this function was not already decompiled in some other overlay (for example make sure that there is no blastoff.c file for a function called s11g_blastoff_800D4744).
When you create a new decomp.me scratch you'll be asked for a context - you can use a context from one of the scratches here . decomp.me will decompile the function into C. Now comes the hard part: make the scratch compile without any errors and implement the function such that it matches the original assembly. This is a highly iterative process.
Help, I am totally stuck? Join our Discord and ask for help in #metal_gear_dev.