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