Valve Software
| Title | Platform | Genre | Score | Release Date |
|---|---|---|---|---|
| Half-Life | PC | First Person Shooter | - | Oct 19, 1998 |
| Half-Life 2 | PC | First Person Shooter | - | Nov 16, 2004 |
| Half-Life 2 | XBOX | First Person Shooter | - | Nov 18, 2005 |
| Half-Life 2 | OSX | First Person Shooter | - | May 26, 2010 |
| Portal 2 | PC | Puzzle | 9/10 | Apr 19, 2011 |
| Portal 2 | PS3 | Puzzle | 9/10 | Apr 19, 2011 |
| Portal 2 | X360 | Puzzle | 9/10 | Apr 19, 2011 |
| Portal 2 | OSX | Puzzle | 9/10 | Apr 19, 2011 |
