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