One fun fact about RCT is that it was written almost entirely in x86 assembly. It used a small C++ wrapper to basically do a few DirectX calls to setup the disp

One fun fact about RCT is that it was written almost entirely in x86 assembly. It used a small C++ wrapper to basically do a few DirectX calls to setup the display and make windows api calls, but the actual game engine, all the guest logic, etc was pure assembly. Same basic engine as Transport Tycoon Deluxe.