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