Donkey Kong

Donkey Kong (1981): The first appearance of Jumpman, who would eventually become Mario! 

Galaga

King of Fighters

King of Fighters 99 (1999): A SNK game where people fight in teams of 4, trying to stop an evil syndicate!

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Metal Slug 3

Metal Slug 3 (2000) A SNK game where the military fight off bad guys, zombies & aliens!

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Ms. Pac-Man

Ms. Pac-Man (1982): A Midway game, spinning-off the popular game Pac-Man!

Vindicators

Vindicators (1988): An Atari game where tanks shoot monsters and get upgrades!