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