I loved to play MechForce on the 2k years ago.
I *loved* MechForce back in the day! Sadly could never get it to run on anything beyond a 1MB, 1.3 A500, however. Shame it was never updated for 2.0-compatibility. Anyone had any luck running it recently? Wow was it a time vampire, though. Think I work too much to have time for MechForce, these days.
As far as games that run on an A2000, pretty much anything that doesn't require AGA will run. Depends what kind of games you like? If you're into action stuff, I've really been enjoying Ruff-N-Tumble lately. One of the most polished non-AGA action games. Been banging through it with that new joystick from AmigaKit, lol.
http://www.youtube.com/watch?v=2Kvpm4t4A1o Of course I was always more into strategy and RPG stuff, the Gold Box AD&D stuff from SSI, etc. All of those will run fine on an A2000.