So i heard....

That Rockstar has decided to release some of its older games for free...

http://www.rockstargames.com/classics/?id=1

check them out. 

the only game i can really vouch for is GTA 2 which i have played before and completed. wasn't a completely fulfilling experience, but it is fun to play. there's quite a fair bit of replayability not just for the fact that there are side missions and mini games, but the in game factions themselves have a tonne of missions that you can play, most of which come with the standard flair that we have come to associate with Rockstar. 

however, with the games coming out from Rockstar, they can't be that bad.