some of the choices on that list are a bit odd. it was really good to see df on there, though i really think the description could have been better. it does not even try to communicate the craziness df can dish out. or the fact that unlike most of the other titles it is a constantly evolving work in progress that is allways improving.
planescape: torment was a great game. nice to see other people remember it. one of the only games i can ever remember getting emotionally involved in. people remember baldures gate games more but i found them confining and by the book. like marching along a set of stereotypical fantasy rail tracks. ive played nearly everything on there, and torment, system shock 2, lemmings, freespace 2 and the thief are games are the only old ones i would go back to play again.
also, flashpoint was a totally undervalued and very wicked shooter. not at all like anything else ive yet seen. the creators tried very hard to make it feel as real as possible. and you could script your own ww3 battles with the level editor. i can remember flying around in a helicopter watching massive beach landings of US soldiers, with columns of russian tanks streaming from inland towns to the coast being ambushed by little groups of partisans, while hellicopters full of special forces tried to make their way inland and hold key points. not unlike DF it was a real labour of love and was buggy as hell.
as i mentioned, and as people are pointing out, some of those choices are pretty odd, for instance red alert realy has nowhere near the multiplayer appeal of starcraft, or many other RTS games. its got lots of horrible imbalances that as i recall never got patched out, and nobody plays it anymore. and counterstike source? gameplay wise its exactly the same as counterstrike, only when i played it nobody would use it for competitions, as the hitboxes (thats invisible boxes around bits of people that determine when a shot hits or not) allowed a lot of weirdness. at risk of undervaluing the fact that DF fortress is on there, these titles are not exactly the best most revolutionary and genre changing games of all time, more like a list of the writers favourites.