Worms have a tendency to keep coming back. No matter how many you throw in the ocean, the next time it rains, they'll be all over the sidewalk. The same holds true for Team17's classic strategy game, because the developer has a never-ending supply of Worms. The latest is Worms Clan Wars, which is scheduled for release in Q3 on PC.
Team17 will be debuting the game this weekend at the Rezzed indie show, but if you're nowhere near the UK, you can always just sign up to be a beta tester. The developer says it will start responding to beta testers in the next few weeks, but notes that it's a closed beta so not everyone who applies will receive a response.