Galaxian (1979)
Ms. Pac-Man (1982) - the Pac-Man sequel
Dig Dug (1982)
Phozon (1983)
Pole Position II (1983)
The Tower of Druaga (1984) - including Another Tower and Darkness Tower
I do suggest you try Phozon as it's the most unique game in this collection. The others are your standard retro fare