Worms Revolution, the latest installment in the 2D strategy shooter, is free to play this weekend on Steam. The game is gratis until Sunday at 1PM Pacific.

Additionally, the game's price is marked down by 50 percent to $7.49 this weekend, and cheaper when purchased in a four-pack for friends. That sale lasts until Monday, April 22.

Revolution differentiated itself from the other Worms in the franchise with "dynamic water, physics objects and worm classes" amidst the usual invertebrate warfare.

This article was originally published on Joystiq.