Interesting list.
PCG defined the best as in what would be the best right now - which I then assume means you should be able to play them. Would love to see Ultima Underworld playable on modern PCs - but I don't think it is. Screen view is too small, however the auto-map was amazing and way ahead of its time. This was one of the greatest game EVER in the history of time and space. It was the only game that both my brother and I took turns to play it. We would even take our lunch or dinner upstairs and eat and watch the other play. Oh how I wish it was good enough technically to play now. By the way - my brother was a Doom/ Unreal nut and did not play any other RPGs.
A bit embarrassed with the high number of BioWare games near the top - in my opinion DAO was just complete pants of a game. I bought it - played it a bit, forced myself to play it a bit more, nearly killed myself, wished I could delete it off Steam. I do rate it highly however in my top 10 lists of games that made me vow never to trust magazine reviews. Take a look here and then puke in a bucket.
http://www.metacritic.com/game/pc/dragon-age-origins/critic-reviews
I assume this was evidence of some type of mass hysteria - something similar to when Princess Diane died and she became the People's Princess?
Okay with Torchlight 2 being on the list - but I would add Titan Quest IT above it - that still plays well on modern PCs and I even think the graphics are better.
I love the music in TQ and the journey through different ages of our past mythology through the Greek, Egyptian and Chinese worlds. The game has quite a lot of length to it although the final bosses are a bit naff. A bunch of different classes that can be combined for you to try next time around.
Although old, SS2 can be played easily enough on modern PCs and has a decent story line with killer monkeys, killer robots, ghostly apparitions and zombie creatures that warn you to run away before they attack. I am quite happy with it being 9th place on the list even though not happy with many above it. Makes me think about the PC Gamer crew as even though it had SS2 on its top 100 games of all time, it disappeared from the last list I saw and now appears 9th on this list - what are they smoking?
Happy that Dungeons of Dred is on the list - random dungeons, it's funny, you can craft away, you can play as a Communist Vampire - and you have the Steam Workshop incorporated. You really don't have any idea what is behind any door, the graphics are simple and suitable.
So a decent list with many types of games, we have the Clickers, First Person Warriors, Team Players etc. Can someone just fix Ultima Underworld please? Maybe I try Arx next when I have time, apparently that is similar.