Here is the full list of all 63 Gunslugs achievements.
Take a jetpack ride
Rescue Sonya
Kill 20 guys
Kill 10 guys with grenades
Score 1000 points
Complete mission 2.2
Complete mission 2.3
Drive a tank
Locate the arcade !
Get your train ticket and ride.. or run
Find "a" princess
Collect 175 coins in one game
Collect 150 coins
Kill a chicken, and spread some eggs!
Collect 125 coins in one game
Change the tune using a jukebox
Rescue Sly Rocko
Complete mission 2.1
Complete mission 1.3
Score 500 points
Kill 5 guys from cover
Blow up 2 dudes at once
Air kill a dude
Find the voodoo priest
Collect 100 coins
Make a chopper crash
Kill 10 guys in a mission
Collect 75 coins
Complete mission 1.2
Grab a new weapon
Complete bootcamp
Complete mission 1.1
Deactivate your first beacon
Take cover rookie!
Rescue Willis KiYay
Grab energy drink
Chain explosion of 2
Complete mission 3.1
Blow up 4 dudes at once
Kill 50 guys in one mission
Complete mission 3.2
Score 2000 points
Chain explosion of 3
Destroy four mechballs
Complete mission 3.3
Rescue B.A. Baracuda
Drive over 5 dudes with a tank
Complete mission 4.1
Drive over 10 dudes with a tank
Rescue Sarge
Score 2500 points
Complete mission 4.2
Blowup a death worm
Complete mission 4.3
Kill a flying fire skull
Complete mission 5.1
Kill 5 skulls in one mission
Complete mission 5.2
Destroy 5 hell tanks in one game
Complete mission 5.3
Complete Hell with Sarge
Complete Hell with BA
Find the sketch world!