Full list of all 198 Alien Swarm: Reactive Drop achievements.
The base game contains 143 achievements, and there are 4 DLC packs containing 55 achievements.
Kill 500 Swarm with Gas Grenades.
Kill 500 Swarm with the Heavy Rifle.
Kill 500 Swarm with the Medical SMG.
Complete the Nam Humanum campaign on Easy difficulty or harder.
Complete the Nam Humanum campaign on Normal difficulty or harder.
Complete the Nam Humanum campaign on Hard difficulty or harder.
Complete the Nam Humanum campaign on Insane difficulty or harder.
Complete the Nam Humanum campaign on Brutal difficulty.
Complete Logistics Area within 1:10 on Normal difficulty or harder without any marines dying.
Complete Platform XVII within 3:02 on Normal difficulty or harder without any marines dying.
Complete Groundwork Labs within 2:25 on Normal difficulty or harder without any marines dying.
Complete the Nam Humanum campaign on Normal difficulty or harder without any marines dying.
In Groundwork Labs, upload prohibited data to the ship.
Complete the BioGen Corporation campaign on Easy difficulty or harder.
Complete the BioGen Corporation campaign on Normal difficulty or harder.
Complete the BioGen Corporation campaign on Hard difficulty or harder.
Complete the BioGen Corporation campaign on Insane difficulty or harder.
Complete the BioGen Corporation campaign on Brutal difficulty.
Complete Operation x5 within 3:28 on Normal difficulty or harder without any marines dying.
Complete Invisible Threat within 1:13 on Normal difficulty or harder without any marines dying.
Complete BioGen Labs within 4:14 on Normal difficulty or harder without any marines dying.
Complete the BioGen Corporation campaign on Normal difficulty or harder without any marines dying.
Complete Space Port Catastrophe within 1:50 on Normal difficulty or harder without any marines dying.
Complete Rapture within 2:00 on Normal difficulty or harder without any marines dying.
Complete Bunker within 1:30 on Normal difficulty or harder without any marines dying.
Complete the Accident 32 campaign on Easy difficulty or harder.
Complete the Accident 32 campaign on Normal difficulty or harder.
Complete the Accident 32 campaign on Hard difficulty or harder.
Complete the Accident 32 campaign on Insane difficulty or harder.
Complete the Accident 32 campaign on Brutal difficulty.
Complete Information Department within 1:42 on Normal difficulty or harder without any marines dying.
Complete Powerhood within 2:07 on Normal difficulty or harder without any marines dying.
Complete Research Center within 1:29 on Normal difficulty or harder without any marines dying.
Complete Confined Facility within 2:02 on Normal difficulty or harder without any marines dying.
Complete J5 Connector within 2:00 on Normal difficulty or harder without any marines dying.
Complete Lab Ruins within 3:33 on Normal difficulty or harder without any marines dying.
Complete AMBER Complex within 8:00 on Normal difficulty or harder without any marines dying.
Complete the Accident 32 campaign on Normal difficulty or harder without any marines dying.
Die in 25 different ways.
Finish Marine Academy with a score of at least 100 points.
Finish the volcano zone in Marine Academy without any marines dying.
Visit each zone (not including the lobby) in Marine Academy exactly once.
In Lab Ruins, defeat the Muon Gem boss in three hits.
Complete the Reduction campaign on Easy difficulty or harder.
Complete the Reduction campaign on Normal difficulty or harder.
Complete the Reduction campaign on Hard difficulty or harder.
Complete the Reduction campaign on Insane difficulty or harder.
Complete the Reduction campaign on Brutal difficulty.
Complete Silent Station within 4:40 on Normal difficulty or harder without any marines dying.
Complete Operation Sandstorm within 3:00 on Normal difficulty or harder without any marines dying.
Complete Fallen City within 1:38 on Normal difficulty or harder without any marines dying.
Complete Stowaway within 1:15 on Normal difficulty or harder without any marines dying.
Complete Inevitable Escalation within 6:00 on Normal difficulty or harder without any marines dying.
Complete Nuclear Escort within 4:44 on Normal difficulty or harder without any marines dying.
Complete the Reduction campaign on Normal difficulty or harder without any marines dying.