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