The latest game in the Worms series is Worms Ultimate Mayhem which was released September 28, 2011 for PC, PS3 and Xbox 360.
The game is a mix of content from two other Worms titles, Worms 3D and Worms 4: Mayhem. The campaign is identical to the one in Worms 4. As any Worms game you take control of worms trying to complete different task on a stage. For example in a stage you need to collect specific items or you have to destroy a specific target. But the main task is killing enemy worms.