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