Originally Posted by
TaiLiu
One computer game that uses a d20 engine and hasn't been mentioned yet is Dungeons & Dragons Online (DDO). It's a real-time MMORPG. To my knowledge, the developers have been moving away from the d20 engine by adding all kinds of calculations that would be a real pain to do in a TTRPG. But the core is still technically the d20. I think they've been adding all that stuff cuz the d20 engine, along with things like binary AC and all that, is a poor fit for a MMORPG.
So... I guess it depends on yr goal. If you wanna make something super dedicated to TTRPG D&D, something like a AI-powered VTT, then the d20 engine is great. A MMORPG, not so much.