Here is the full list of all 39 Rad Rodgers achievements worth 1,000 gamerscore.
Use the Photo Mode
Kill 5 enemies within 5 seconds with Laserblades
Drown 5 times
Watch all the credits
Complete a level without dying
Collect a Lion Trophy
Skip a cutscene
Complete W1L1
Find the Excalibat
Find a Secret Area
Defeat Mother Nature in 4 minutes
Collect all Lion Trophies
Complete W1L1 100%
Complete W1L2 100%
Complete W1L3 100%
Complete W1L4 100%
Complete W1L5 100%
Complete W1L6 100%
Complete W1L7 100%
Complete W1L8 100%
Complete W1L9 100%
Defeat the first Boomer in less than 30 seconds
Defeat the second Boomer in less than 30 seconds
Find all Hats
Unlock all Artwork
Complete Jungle World 100%
Find the Dopefish
Find all Secret Areas
Dusty Slam every kind of enemy
Complete a level without killing a single enemy.
Complete and kill all enemies in a level only using Dusty Slam
Kill every single enemy in the entire game, no enemies left alive
Collect all Gems in the game
Visit all huts
Complete Jungle World 100% on Hard Mode
Complete Jungle World 100% on Easy Mode
Complete Pogo Vertigo 1 100%
Complete Pogo Vertigo 2 100%
Complete Pogo Vertigo 3 100%