Strafe is a defence management game in which you manage a defence system and resources to survive the incoming enemies. The guns take down the enemies on their own so it's up to you to figure out how to manage them properly. As there isn't that much involvement in the game it is pretty casual and relaxed and altough the game mechanics are simple in the end they are hard to master and the maps can be incredibly diverse.
The game includes a normal single player mode, that unlocks new maps, and a survival mode. On top of that there is also a two player mode on a single computer.