box86
Linux Userspace x86 Emulator with a twist
Box86 will let you run x86 Linux programs (games) on non-x86 Linux, like ARM (needs to be 32bit little-endian).
Also, Box86 uses the native version for some "system" libraries, like libc, libm, or SDL and OpenGL, leading to more performance and easier integration with the host system.
Most x86 Games need OpenGL, so on ARM platforms, a solution like gl4es is probably needed.
Box86 now integrate a DynaRec for ARM platform. While the Dynarec is still incomplete, it already gives some speed boost on certain cases
The current version is still experimental, so some stuff still wont run. But many do work, like for example, WorldOfGoo (at least on the Pandora), Airline Tycoon Deluxe or new FTL. Many of the GameMaker linux games also run fine.
If you are serious about developing Box86, you should install ccache and activate it's support in the cmake project (use ccmake for example) To have TRACE enabled (i.e. dumping to stdout all individual x86 instructions executed, with dump of registers), you'll also need Zydis library accessible on your system.
Some x86 internal opcodes use parts of "Realmode X86 Emulator Library", see x86primop.c for copyright details
Here are 6 videos, the first 2 of "Airline Tycoon Deluxe" and "Heretic 2" running on a gigahertz OpenPandora (the second one use the dynarec), and the next 2 of "Bit.Trip.Runner" and "Neverwinter Night" running on an ODroid XU4, and the last 2 on a Pi4: Shovel Knight (video from @ITotalJustice) and Freedom Planet (video from @djazz)
Compiling
How to compile can be found here
Usage
There are a few environment variables to control Box86 behaviour.
See here for all variables and what they do.
Version history
The change log is here
A note about Unity game emulation
Running Unity games is not possible for now. Mono itself uses signals that are not well emulated enough. So the solution is to use a native version of the libmono used by Unity. It can be found here: https://github.com/Unity-Technologies/mono and it needs to be built from source. When built copy libmonosgen-2.0.so to libmonounity.so and put it somewhere it can be dlopen'd (so in usr/lib or friend or somewhere in your LD_LIBRARY_PATH).
Note that libmonounity is not completely wrapped yet, and the mechanism to call x86 library from libmonounity is not done yet
Final words
(If you use Box86 in your project, please don't forget to mention Box86)