Unlockable medals
     By  completing  certain  ingame tasks, you can unlock medals that
can be viewed by going to options and then medal cabinet.

Unlockable:         How to unlock:
100% complete       100% completion
Annihilation        Win by alot of health
Beserker            Kill 8 or more worms in one round
Big spender         Buy every item in the shop
Boffin              Complete all puzzles (including unlockable levels
Field marshall      Win 20+ online games
Laboratory          Beat all laboratory levels 
                    (including unlockable levels
Outstanding bravery Made a comeback (win when you are losing by alot)
Rookie              Beat all training levels
Tough nut           Beat all campaign levels 
                    (including unlockable levels)
Veteran             Play 20 online games
Winning sreak       Win 5 games in a row