[quote name='gunm']As much as I like compilations of old school games, I hate unlocking games within the game. Just let me play it when I want!

[/QUOTE]
You must have loved Sonic Gems Collection:
Bare Knuckle (aka Street of Rage) play SGC for a total of 12 hours and play Bonanza Bros once or play any combination of any other game at least 30 times.
Bare Knuckle 2 (aka Street of Rage 2) play SGC for a total of 12 hours and play Bare Knuckle once or play any combination of any other game at least 50 times.
Bare Knuckle 3 (aka Street of Rage 3) play SGC for a total of 12 hours and play Bare Knuckle 2 once or play any combination of any other game at least 70 times.
Bonanza Bros. play SGC for a total of 12 hours, play Vectorman 2 once or play any combination of any other game at least 20 times.
Vectorman play SGC for a total of 5 hours or have a Sonic Mega Collection save file in your memory card.
Vectorman 2 play SGC for a total of 7 hours and play Vectorman once.
I think there was another Sega compilation... maybe the original Sonic Mega Collection... that actually required you to have a save file for Sonic Heroes to unlock a game at all. There was no other way. I think it was Comix Zone, so no big loss, but still. Ridiculous.