Brickout: 
Get 15,000 points or more in Night Stalker to unlock the Brickout game. 

Deep Pockets: Pool And Billiards: 
Beat the dealer in Las Vegas Poker And Blackjack to unlock the Pool And Billiards 
game. 

Hard Hat: 
Get 300 points or more in Frog Bog to unlock the Hard Hat game. 

Combat and sorcery game commercials:
Get 2,000 points or more in Sub Hunt. 

Space game commercials:
Get 20,000 points or more in Astrosmash. 

Sports game commercials:
Finish five laps in five minutes or less in Auto Racing.