If you're talking about reality, then it is PS2, hands down...like dude said they're still making games for it, and only recently stopped producing the system.
Personally, however I'd go with Game Boy. Thanks to the GBA's compatibility with the entire library I played the shyt out of older titles well after their release.
Personally, however I'd go with Game Boy. Thanks to the GBA's compatibility with the entire library I played the shyt out of older titles well after their release.


I understand the ps3 didn't have a decent game for it until 2yrs into its cycle. But what did the ps2 have? God of War dropped right after the ps3 was released. Most people can't name another game. And realistically if you was still playin ps2 games when the ps3/360 was here? 
