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