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Atari 8-bit games. This list is believed to be incomplete.

Additional games can probably be found here, and here.

Total games: 110

1. 221 B Baker St.
2. 3-D Tic-Tac-Toe
3. 50 Mission Crush
4. Ace of Aces
5. Age of Adventure
6. Airball
7. Alien Garden
8. Alley Cat
9. Andromeda Conquest
10. Anthill
11. Apple Panic
12. Archon: The Light and the Dark
13. Armor Assault
14. Arkanoid
15. Asteroids
16. Ballblazer
17. Barnyard Blaster
18. Basketball
19. Battlezone
20. Beef Drop
21. Berzerk
22. Blue Max
23. Bomb Jack
24. Bug Hunt
25. Bruce Lee
26. Castle Wolfenstein
27. Centipede
28. Championship Lode Runner
29. Choplifter!
30. Congo Bongo
31. Crime Buster
32. Crossbow
33. Crystal Castles
34. Dark Chambers
35. David's Midnight Magic
36. Defender
37. Deluxe Invaders
38. Desert Falcon
39. Dig Dug
40. Donkey Kong
41. Donkey Kong Jr.
42. Eastern Front
43. Electrician
44. Fight Night
45. Final Legacy
46. Flight Simulator II
47. Food Fight
48. Football Manager
49. Fortune Hunter
50. Frogger
51. Galactic Chase
52. Galaxian
53. Gato
54. Gauntlet
55. Ghostbusters
56. Gorf
57. Green Beret
58. Hardball!
59. Into the Eagle's Nest
60. Joust
61. Jr. Pac-Man
62. Jungle Hunt
63. K-Razy Shoot-out
64. Kaboom!
65. Karateka
66. Lode Runner
67. M.U.L.E.
68. Mario Bros.
69. Millipede
70. Miner 2049er
71. Missile Command
72. Montezuma's Revenge
73. Moon Patrol
74. Mr. Dig
75. Mr. Do!
76. Mr. Do's Castle
77. Ms. Pac-Man
78. Necromancer
79. One on One Basketball
80. Pac-Man
81. Pengo
82. Pengon
83. Pitstop II
84. Pole Position
85. Pooyan
86. Popeye
87. Q*bert
88. Qix
89. Rampage
90. Rescue on Fractalus!
91. Robotron: 2084
92. Space Invaders
93. Spelunker
94. Spy vs. Spy
95. Spy vs. Spy II: The Island Caper
96. Spy vs. Spy III: Arctic Antics
97. Spy vs. Spy Volume I & II
98. Stargate
99. Star Raiders
100. Star Raiders 2
101. Star Wars
102. Summer Games
103. Super Pac-Man
104. Super Zaxxon
105. Tapper
106. Thunderfox
107. Track & Field
108. Vanguard
109. Wizard of Wor
110. Zaxxon