Games developed by Valve

Game Score Ratio Gamers Comp % Comp Time Rating
Left 4 Dead Left 4 Dead 2,882 (1,500) 1.921 188,627 2.66 40-50 hours
4.2
Left 4 Dead 2 Left 4 Dead 2 2,802 (1,500) 1.868 179,573 3.53 20-25 hours
4.2
Portal 2 Portal 2 1,715 (1,000) 1.715 132,267 9.54 15-20 hours
4.6
Portal: Still Alive Portal: Still Alive 308 (200) 1.541 43,555 23.06 6-8 hours
4.5
The Orange Box The Orange Box 2,423 (1,000) 2.423 147,369 1.79 80-100 hours
4.3