Oh I dont even know where to start.
Diggles: The Myth of Fenris - really good RTS for exploration and development, It takes hours, maybe days to get on top of tech tree and you are in underground world which generates as you dig. Graphic was pretty bad even for 2002, especially animation. Sound and voiceactiong wasnt good either but really good music and nice looking, endless underground created perfect atmosphere and epic feeling.
Gothic 1/2/3 - The games looked great, combat is much about skill and leveling was good and simple. Games (mainly Gothic 2 with expansion pack) was really difficult. Overall games had good gameplay, good story, they looked and souded nice, there is lot of mods for them. Their biggest flaws were bugs and gliches (mainly in 3rd game which is alredy repaired by huge community patch). Gothic 3 is even by fans considered to be weakest of the series, yet it almost won GOTY award instead of oblivion (It ended up on 2nd place but that was before patches).
Arx Fatalis - This was decent RPG but what really makes it shine in my eyes is that it had some things that lots of games dont. Mainly secrets on every corner. Hidden passages, destroyable walls and such which made good atmosphere of game even better.
Prince of Persia 3D - It wasnt THAT bad. Everyone who have seen Yahtzees PoP retrospective knows about flaws but game also had nice level design, atmospfere and gameplay was like classic PoP games which, of course, wasnt enough by the time when it came out.
Keepsake - Good looking game with decent story and good puzzles. It isnt best adventure game but is still think that 6/10 rating was pretty low.
All these games were forgotten due to their more visiable flaws but under those there was a golden core. Witch for me is mainly overall atmosphere of the game.
Sorry for possible grammar flaws.
EDIT:comments to games
