Find ancient armor (Single Player only)
Kill the boss on level 2 (Single Player only)
Destroy 6 disruptors without taking a hit on level 4 (Single Player only)
Destroy all the disruptors without taking a hit on level 4 (Single Player only)
Destroy all the disruptors with the shotgun on level 4 (Single Player only)
Each machine must retain more than 40% HP on level 7 (Single Player only)
Kill 3 enemies using the laser on level 8 (Single Player only)
Finish level 9 without killing any enemies (Single Player only)
Don't let the VIP lose any HP on level 10 (Single Player only)
Finish level 11 in less than 3 minutes 41 seconds (Single Player only)
Finish level 12 without getting hit by a tower (Single Player only)
Destroy all the towers without killing any enemies on level 12 (Single Player only)
Jump between planets 300 times
Have an enemy die from a grenade after you died
Kill 15 enemies without losing any HP on a single level
Find the hidden area on level 3
Interrupt 10 flying enemy attacks with a shotgun
Stand on every planet in the game
Complete 3 levels in a row without dying
Complete 6 levels in a row without dying
Kill 7 enemies with a single plasma grenade
Kill 17 enemies from a different planet
Kill 33 enemies from a different planet
Collect a gold medal on each level
Hit an enemy 19 times without dying
Finish a level (other than level 01) destroying only the marked enemies (Single Player only)
Kill 4 enemies with a single shot from the stun gun
Stun 6 enemies at the same time with a stun grenade
Kill 8 enemies with a single shot from the rocket launcher
Set 8 enemies on fire with a single molotov grenade
Finish all the levels on hard difficulty
Kill ramper having 30% HP
