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