are there any old 90'z mac games for download

I was just wondering if there was anyway to get digital downloads of old early 90's (at least thats when I played them) mac games, or if apple will put out an "Arcade" type style such as the WII did allowing you to download old games such as: Super Mario Bro's 1 ect. I was just seeing if there was a way to get the old school Oregon Trail, Cannon Fodder ( I belive it was called), or also the helicopter drop game, and yes I would like these to be the old ones in black and white. there was also a "Tron" type game.