From Team17 Facebook
Hi Xbox fans. There is now a patch available which fixes the saving crash on Worms Revolution.
If you deleted your save and need to start again then you'll receive 800 credits when you make a new save, and there's also a cheat code available (please see below for those who would like this) that will unlock all the Campaign and Puzzle missions. This means you don't have to start all over again andcan re-unlock your choice of classes.
Team17 would like to apologise again for any inconvenience caused and we hope you'll continue to enjoy the game.
Have a fantastic Christmas guys and girls.
Worms Revolution Cheat Code (for Xbox 360)
1. Launch Worms Revolution
2. Select Help & Options
3. Select Credits
4. Press X, A, Y
If you use the cheat code, and then beat any level, you'll unlock the achievements for completing the campaign and all the single player content.