I used only mainstream games. I think everything here is Atari, Activision, Sega, etc.
So no Custer. Sorry.
If you have answers, go crazy. Perhaps use SPOILERS or similar so people can skip by your post if they want. :^)
2. Yar's Revenge
3. Baseball (or whatever Atari's name for it was: I had the Sears Telegames version)
4. Adventure (w00t!)
6. ? (Jungle Hunt?)
7. Mountain King
9. ? (I know I've seen it before though, Riddle of the Sphinx?)
11. Moon Patrol?
12. Kaboom! (The colors gave it away as an Activision or Imagic game)
17. ? (Miner 2049'r?)
18. Football (Was tough for me, but the thin strip of darker green at the top gave it away - I think it was one of Mattel's sports ports)
19. ? (My guess is Jawbreaker. A friend says Dig Dug, in which case that'd be a Pooka)
20. Popeye (easy)
22. Pitfall (really easy)
27. Circus Atari (or Skydiver; the sticking-out legs were used in both games)
28. Donkey Kong (yes, that's supposed to be the ape himself)
30. Defender (that's a Lander, to be precise)
31. Empire Strikes Back (one of the best games for the system, IMHO)
32. Rescue from Gargamel's Castle
35. ? (Tennis?)
38. ? (Fishing Derby?)
17 is most definitely Raiders of the Lost Ark.
Are you kidding? Softballs, all! Hrm, proved more difficult after my "give yourself half a second per image" attempt at answering.
okay, got me as is
track & field
superman? (but that'd make two)
really enduro. ;^)