The Incredible has the Adreno 200. It will not play GTA III at any sort of a decent frame-rate. I have it on my iPod touch (64GB 4th gen) and my iPad (64GB OG), and it still lags horribly, and crashes very often due to running out of RAM. Funny to think about, considering it originally ran on a sub 300 MHz cpu with 32MB of RAM. Still runs great on my PS2
, and can be had for $5 at Gamestop.
However you can play 2D and lower end 3D games quite well. Installed Zombieville USA last night, runs just like it does on my iPod.