Here is the full list of all 30 My Friend Pedro achievements.
Kill 2000 enemies
Kick enemies 100 times
Finish the game
Finish chapter "The Internet"
Finish chapter "The Sewer"
Get a 50x combo
Dodge 1000 bullets
Kill 1000 enemies
Finish chapter "Pedro's World"
Finish chapter "District Null"
Kick a frying pan in to the face of an enemy
Break 100 crates
Jump through 10 windows
Kick a skateboard in to the face of an enemy
Kill 500 enemies
Complete a level without firing a weapon
Get an S-rating
Finish chapter "Old Town"
Kill enemy by ricocheting bullet off frying pan
Flip 10 tables
Stick a knife in to an enemy
Kick a Gas Canister in to the face of an enemy
Kill at least 3 enemies with one explosion
Juggle basketball 10 times without it touching anything
Get a 20x combo
Kill an enemy using a barrel
Get a 10x combo
Get S-rating on 10 levels
Get S-rating on 25 levels
Get S-rating on all levels