I'm a die hard pc user, but was given an iMac g3 for free. I planned on letting my brother use it, but would like to put some games on it or anything really first. Does anyone have some suggestions on what is available for a system like this? (I really have no clue when it comes to Macs.) Nothing is on the Mac except the OS (9.2) and here are the specs:

128 mb ram
500 mhz processor
20 gb hd

If you need anymore info I'll try to figure it out. Thanks