11314 bytes

After lots of tweaking compilation and linking parameters, as well as switching from GLFW to SDL and trying pretty much everything I could think of to avoid linking the stdlib.
Here we are, with a completely self-contained executable that segfaults on exit.
If you have any ideas on how to make it smaller, please let me know!

In the meantime, here is Minecraft4K in 11314 bytes in all its glory.