Atari 2600: Combat, Joust, Pitfall
IBM PCjr: King's Quest, Space Quest, (I don't remember the name of the third, it was a game where you were a cat, swimming in fishbowls and hanging out on fences... totally cool. There was also a boxing game where you could play as a kangaroo, I loved that one as well)
IBM XT/AT through the old Pentium I's: F-117, Wolf Pack, Space Quest 3, Myst, Under a Killing Moon, Phantasmagoria (Note: This was my "golden age" lol, that pre-teen/ early teen age of discovery hehe)
NES: Duck Hunt, TMNT, Ninja Gaiden
SNES: Shadowrun (probably my all-time fav, took me a long time to re-find it on E-Bay... was this the first game where you could explore an entire city?), FF3, Doom
PS1: Syphon Filter, MGS, GTA2, Knockout Kings 2000
PS2: Any GTA, Getaway 1 or 2, MGS-SE, GT4, Gun
"Modern" PC (1995+): R6 Rogue Spear, BF42 and BFV (don't really like BF2 or BF2142), MSFS 200x/10, R6-3 (Raven Shield mostly), Worms Armageddon, Civ 3 and 4, Multi-Theft Auto (okay, it's a mod, but it's an awesome mod), TOCA 2 Fallout 1 and 2, Gangsters 2 (XP, grr, #$%@*@#$%^&$!), The Movies, The Sims
^ Any of those games either take me back to a certain time in my life, or can help me relieve stress. Not many people know this, and I'm sure I'll get picked on for it (and I could avoid being candid but eh): When I'm playing GTA or Getaway, sometimes I drive around just to drive, obeying traffic laws and everything. I've always wanted a massively-multiplayer version of GTA where I could play as a traffic cop, sitting there along the Los Santos Expressway pulling people over for speeding. I have a save right now where I'm beating the entire game without killing a single innocent civilian, not car-jacking (I can only take parked cars)... only killing people who I absolutely have to kill. And unless a mission (or my life) depends on it, I don't speed and I obey all of the traffic laws that would apply in real life, to the best of my ability anyway. The best part: no cop-killing. And this is extremely relaxing and a great way for me to wind down after a long day. No one "gets" me
"In an interstellar burst, I'm back to save the universe"