Valve has changed the game requirements for Modular Combat! You will now be able to play if you own one of the following Valve games:
- Half-Life 2
- Portal 2
- Left 4 Dead
- Left 4 Dead 2
P.S. Valve's Tom G. is responsible for this change. Please send him kind regards (but not by email as that would likely annoy him, simply reply here and when enough nice posts are made, ill link him).