Gamasutra - Top 5 PC Games of 2008
Gamasutra posts their 'Best of 2008,' in the midst of which we have their top five games for PC. The number one position goes to Fallout 3:
Bethesda's Fallout 3 not only outshone the studio's previous game, The Elder Scrolls IV: Oblivion, in just about every way, it accomplished the impressive task of satisfying most non-extremist-level fans of Black Isle's venerable Fallout series...
The sheer amount of content in Fallout 3 is extremely impressive, considering what a consistent level of quality it maintains -- and how much of it a player is likely to completely miss, based on the choices made, the NPCs killed, the routes traveled, and any number of other variables. The main storyline pales in comparison to the larger breadth of experiences to be had throughout, and the vast wasteland begs to be lived in.
Honorable mentions go to, amongst others, Hinterland, King's Bounty, and Mass Effect.
Source: Celestial Heavens