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