Here is the full list of all 25 Cloning Clyde achievements.
Become a Mutant-Clyde.
Complete levels 1-24 and 10 Challenge levels under par time.
Complete all of the Challenge Levels.
Run in wheels for 30 minutes (cumulative over a level, but not the game.)
Win the game!
Confuse clyde with extraneous input 15 times
Destroy 100 secuirty bots
Collect all of the cloned Killer Kenn Action Figures.
Clone yourself 50 times
Collect 100 of the cloned Killer Kenn Action Figures
Ride a sheep in the cowboy outfit
Collect 50 of the cloned Killer Kenn Action Figures.
Destroy 50 security bots
Exit 75 clones through the ventilation shafts.
Become an Ape-Clyde.
Destroy a security bot with a rocket
Ride a rocket
Become a Chicken-Clyde.
Rescue 40 clydes
Clone yourself 25 times
Become a Frog-Clyde.
Become a Sheep-Clyde.
Destroy 10 security bots
Super attack five machines
Rescue a clyde