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Requires Javascript
| Platform |     |
|---|---|
| Coop Players | 2 |
| Developer | Valve Corporation |
| Publisher | Valve Corporation |
| Engine | Source |
| Release | Apr 19, 2011 |
| Genres | Action, Platformer, Puzzle |
| Grit | 2.0 |
|---|---|
| Synergy | 7.0 |
| Implementation | 10.0 |
| Longevity | 4.5 |
| Depth | 3.0 |
| Fun | 6.0 |
| Overall | 6.09 |
 | Cooperative Campaign |
|---|---|
 | Local/Split-Screen Option |
 | Online Multiplayer |
 | User-Made Content |