DOOM for SymbOS is a Doom-like 3D First-person shooter, one of the few or only implementations for the supported SymbOS platforms. It is running in a window within the GUI, so you can even start and play Doom multiple times, which wasn't even possible back in the early 90ies on a 32bit system. Running on a 4MHz system it's not the fastest game, but some optimizations are hopefully possible for the future. Doom for SymbOS is a port of the original Doom83/zDoom, which was developed for the TI-83(+)/84+ calculators back in the 2000ies.   
|