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