1. Mario Bros - Yeah played the originals and some of the sequels. Never was very good at them though.
2. Warcraft - I played the second game in the series and the expansion enough to count. (And to know the RTS genre isn’t my favorite)
3. The Elder Scrolls - Yeah played enough of these in the series.
4. Fallout - Played the hell out of all of them along with beat them all.
5. Doom - Played and beat the 3 original games that came out in the 90s. Counts.
6. Donkey Kong - I played the first three arcade games in the series. Again, wasn’t really good at any of them though.
7. Tekken - Eh, I played enough of some of these games in the arcades to count.
8. Borderlands- Beat the first two games
9. The Sims - Played all of them to some degree
10. Fable - Beat all 3 of them though that’s not difficult to do
11. Contra - Never got too far in the arcades with this one, but enough quarters were dumped into it that I’m counting it.
12. Punch-Out - Played the 2 arcade games more than a few times. Played the console one much less, but it’s all enough to count.
13. Saints Row - Beat the first 4 in the series. Second game was the best of the bunch.
14. Warhammer - Well this is sort of broad, but I’ll say yeah since I’ve definitely played more than a few games based in the warhammer world (and 40K)
15. God of War - Beat the first one, played a lot of the second one. Counting it.
16. Tetris - Of course
17. Red Dead Redemption - Beat the first one.
18. Age of Empires - Played the first game in the series. Enough that it once again confirmed that I hate the RTS genre.
19. Prince of Persia - Beat the original game. Played the second which is hard as hell.
20. Ninja Gaiden - Beat the arcade game. Also played one of the console ones which was pretty cool.
21. Deus Ex - Beat the original and Human Revolution
22. GTA - Played all of them in the series save for the “Stories” spinoffs. Bothered to beat half of them.
23. Diablo - Beat the first two games.
24. Assassin’s Creed - Beat the first game. Played the second and lost all interest in the series.
25. Bioshock - Beat all three in the series.
26. Mass Effect - Beat the trilogy
27. Last of Us - Beat the first game.
28. Far Cry - Oddly I only ever played Primal in this series. Beat it. Counts.
29. Resident Evil - Beat the original second game in the series. Tried to play a few others in the series and for whatever reason just never could get into them.
30. Castlevania - Played an arcade version called Haunted Castle more than a few times. Also beat one of the later games in the series.
31. Soul Calibur - Played the first one in the arcades a few times. Played some others (particularly 4) on the consoles.
32. Mortal Kombat - Yeah played the first 3 games quite a bit in the arcades. Never was very good at them.
33. Uncharted - Beat the first 3 games.
34. Sonic the Hedgehog - Really tried to play this one and some of the other 2D sequels multiple times on those Sega Collections. Never was very good at it, but it counts.
35. The Witcher - Beat the second and third game
36. Half-Life - Beat the first game and one of the expansion packs.
37. Dark Souls - Another series I tried to get into multiple times. At some point I played all three games including Demon Souls, and never could get very far in any of them before losing interest. Counting it.
38. Silent Hill - Weirdly only ever played (and beat) the Shattered Memories one for the Wii. Counting it.
39. Dragon Age - Beat the first 2 games.
40. Gears of War - Beat the first 2 games.
41. Dishonored - Beat the first one.
I’m pretty sure I dabbled in a few of the above, Crash Banditcoot and Spyro specifically come to mind playing them enough to beat a couple levels when I was playing on someone else’s console.
So I'm counting all of those as “1” making it 42.
Also this list is for filthy casuals. I could probably rattle off a shitload of obscure games from various genres I played on the C64/Amiga (and Arcades) that maybe only some of the other BOOMERS here might have heard of.