Character Set Unlocks

Character Sets are merits of achievement in Worms 4: Mayhem and Worms: Ultimate Mayhem which are unlocked after certain conditions. They become available in the Item Shop and can be purchased for 500 coins (200 coins in Ultimate Mayhem).

In both games, buying everything (including all of the Sets but not loyalties) unlocks the Kitchen Sink scheme in the Item Shop.

Alien
The Alien worm set does not appear in any of Worms 4: Mayhem 's single-player levels or challenges, but does appear as the enemy team in Worms: Ultimate Mayhem 's 'Worms 3D' Campaign's Space-themed levels. The soundbank in the set is different from the soundbank of the same name that appeared in Worms 3D, Worms (2007), and Worms: Open Warfare and is more talkative than usual.

Unlock requirement:
 * In Worms 4: Mayhem, beat all Time Bonuses in the Story Mode.
 * In Worms: Ultimate Mayhem, this character set is immediately available for purchase in the Item Shop.

Cyborg
The Cyborg worm set appears as the enemy team in the last Tutorial level.

Unlock requirement:
 * In Worms 4: Mayhem, complete all trophies in the Trophy Cabinet.
 * In Worms: Ultimate Mayhem, complete all levels in the Tutorial. This is because of the removal of the Trophy Cabinet in conjunction with the introduction of achievements.
 * However, this unlock method seems to be bugged. The character set should be available after completing five levels in the Story Mode, provided the Tutorial is also completed.

Dino
The Dino worm set appears as the enemy team in the last four Story Mode levels, first in 'Escape From Tree-Rex'.

Unlock requirement:
 * In Worms 4: Mayhem and Worms: Ultimate Mayhem, beat all Time Bonuses in the Challenge Trials.
 * In Ultimate Mayhem, DLC Challenge Trials do not count towards unlocking this character set.

Professor
The Professor worm set is somewhat akin to Professor Worminkle.

Unlock requirement:
 * In Worms 4: Mayhem and Worms: Ultimate Mayhem, complete all levels in the Story Mode.

Wormenstein
The Wormenstein worm set is somewhat akin to the look of Frankenstein's monster. The soundbank in the set is different from the soundbank of the same name that appeared as an easter egg in the level Grave Danger in Worms 3D and is more talkative than usual.

Unlock requirement:
 * In Worms 4: Mayhem and Worms: Ultimate Mayhem, beat all Time Bonuses in the Challenge Deathmatches.
 * In Ultimate Mayhem, the DLC Challenge Deathmatch does not count towards unlocking this character set.