[imisssunwell]

Ancient Games:

Prince of Persia (the original one from the 80s)
Hero's Quest (aka Quest for Glory I)
Simcity (the original one)
Golden Axe (not really groundbreaking but way too much fun back in the day)
Ultima series (some games, not all)
Monkey Island I
Indiana Jones and the Fate of Atlantis
King's Quest V, VI
Death Gate
Darklands
Albion
Elite

Recent Games:
Planescape: Torment
Baldur's Gate II+Throne of Bhaal
Diablo II
Zelda: Ocarina (and generally, all Zelda games are of extremely high quality)
Final Fantasy I, II, III (played the remakes on PSP & DS recently)
Dreamfall (my favorite adventure since the mid 90's)
The Longest Journey
Fahrenheit (enjoyed it but I put it here mostly as an interesting effort rather than as an unforgettable game)
Knights of the Old Republic II (for the first half of the game, the rest was sh**y because Obsidian had to hurry)
Neverwinter Nights II: Mask of the Betrayer (*only Mask of the Betrayer*, not the orginical campaign nor SoZ)
World of Warcraft (especially Sunwell, which imho was the pinnacle of raiding, quit in early Wotlk)
Mass Effect 2 (absolutely stunning with quality actors for each character in the game)


Upcoming games I expect/hope to push their genres further: Dragon Age II, Dreamfall Chapters, Diablo II, Star Wars: The Old Republic.