ACHIEVEMENT - HOW TO UNLOCK
Absurd Amphibian (10 points) - Become a Frog-Clyde.
Ancestorial Antics (14 points) - Become an Ape-Clyde.
Battle Addict (12 points) - Play Versus mode.
Becoming Baaaad (8 points) - Become a Sheep-Clyde.
D.N.Ain't (16 points) - Become a Mutant-Clyde.
Dupliclone Dash (18 points) - Beat levels 1 to 24 and 10 Challenge levels under the goal time.
Foolish Freedom (20 points) - Exit 75 clones through the ventilation shafts.
Kenn Collection (15 points) - Collect 50 cloned Killer Kenn Action Figures.
Killer Kudos (25 points) - Collect 100 cloned Killer Kenn Action Figures.
King Clyde (20 points) - Beat all of Super-Challenge levels.
Master of all Clyde-Dumb (30 points) - Beat the game.
Poultry Party (12 points) - Become a Chicken-Clyde.

Unlock the following gamerpics by performing the corresponding tasks:

GAMERPIC - HOW TO UNLOCK
Chicken Gamerpic - Complete the Training levels.
Clyde Gamerpic - Complete all levels, including the bonus levels.

To unlock Mutant-Clyde, complete the game. He will become available at the cheats menu.