Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Annihilation	Kill 30 enemies in a row without dying or being incapacitated.
Beast Slayer	Get the killing blow on the Banshee.
Bloodthirsty	Kill 15 enemies in a row without dying or being incapacitated.
Bruiser	Kill 10 enemies in a row with the Melee Attack without dying.
Catch!	Kill 10 enemies in a row with Grenades without dying.
Co-Ordinated Fire	Complete any Level, in any difficulty, in a 4-player co-op game.
Combustion	Kill 4 enemies simultaneously with a Grenade.
Complete Level 2 in any difficulty mode	Complete Level 2 in any difficulty mode.
Death Touch	Kill an enemy Player after you die.
Denial	End an enemy Player's killing spree.
Domination	Win a Capture The Flag round with 10 kills and zero deaths.
Eat Lead!	Kill 10 enemies in a row with the Chimera without dying.
Field Medic	Revive an incapacitated Player 10 times in Campaign Mode.
Flawless	Win a Team Deathmatch round with 10 kills and zero deaths.
Grizzled Veteran	Complete all 4 Levels in 'Nightmare' difficulty mode.
Gunslinger	Kill 10 enemies in a row with the Piranha without dying.
Jack Of All Trades	Obtain Rank 5 in all 4 XP categories.
Kleptomaniac	Capture the Flag 3 times during a Capture-The-Flag round.
Level 1 Complete	Complete Level 1 in any difficulty mode.
Level 3 Complete	Complete Level 3 in any difficulty mode.
Level 4 Complete	Complete Level 4 in any difficulty mode.
Master Of All Trades	Obtain Rank 10 in all 4 XP categories.
Matador	Get the killing blow on the Digger.
No Escape	Kill 10 enemies in a row with Adhesive Grenades without dying.
One-Man Army	Win a Deathmatch round with at least 50 kills.
Prolific Killer	Kill 20 enemies in a row without dying or being incapacitated.
Regicide	Get the killing blow on Lilith.
Rifleman	Kill 10 enemies in a row with the Reaper without dying.
Rocket Man	Kill 10 enemies in a row with the Manticore without dying.
Seassoned Pro	Complete all 4 Levels in 'Normal' difficulty mode.
Sharpshooter	Kill 10 enemies in a row with the Guardian without dying.
Slaughter	Kill 25 enemies in a row without dying or being incapacitated.
Small Arms Specialist	Complete any Level, in any difficulty, using only the Piranha.
Splash Damage	Kill 4 enemies simultaneously with the Shockwave Ability.
Spray and Prey	Kill 10 enemies in a row with the Firefly without dying.
Stuck On You	Kill 4 enemies simultaneously with an Adhesive Grenade.
Survival Expert	Complete Level 3 in any difficulty mode without being incapacitated.
Survival Master	Complete Level 4 in any difficulty mode without being incapacitated.
Survival Specialist	Complete Level 2 in any difficulty mode without being incapacitated.
Survivor	Complete Level 1 in any difficulty mode without being incapacitated.
Troublemaker	Restart the game after disabling VAC without having a VAC banned account. Why would you want to disable VAC? Hmmm...
Tsunami	Kill 10 enemies in a row with the Shockwave without dying.
Up Close and Personal	Kill 10 enemies in a row with the Barracuda without dying.
Weapons Pro	Obtain all Weapons Awards.