Complete Entrance.
Complete Outer Complex.
Complete Ammunition Dump 1.
Complete Recreation Rooms.
Complete Medical Laboratory.
Complete Ammunition Dump 2.
Complete Garage.
Complete Ammunition Dump 3.
Complete Atmosphere Sub-Level.
Complete Security Catwalks.
Complete Atmopshere Sub-Basement.
Complete Queen's Lair 1.
Complete Living Area.
Complete Canteen.
Complete Meeting Tower.
Complete Leadworks.
Complete Tunnels and Ducts 1.
Complete Mining and Smelting.
Complete Furnace Controls.
Complete Tunnels and Ducts 2.
Complete Lead Mould.
Complete Queen's Lair 2.
From a new save, obtain 200 Health and 200 Armor.
Recover 50 Health from Dermpatches.
Kill 5 Xenomorphs with the Pistol active.
Complete Tunnels.
Complete Pilot's Chamber 1.
Complete Canyons and Catacombs.
Complete Pilot's Chamber 2.
Complete Secrets.
Complete Inorganics 1.
Complete Pilot's Chamber 3.
Complete Droplifts.
Complete Inorganics 2.
Complete Pilot's Chamber 4.
Complete Egg Chambers.
Complete Pilot's Chamber 5.
Complete Queen's Lair 3.
[SS] From a new game, complete Levels 1-11 on Xenomania Difficulty. [Supply Drops Optional]
[SS] Using the Cheat Code "FLYTO12", complete Levels 12-21 on Xenomania Difficulty. [Supply Drops Optional]
[SS] Using the Cheat Code "FLYTO22", complete Levels 22-34 on Xenomania Difficulty. [Supply Drops Optional]
Complete Entrance with 100% Kills, Secrets, and Mission Objectives.
Complete Outer Complex with 100% Kills, Secrets, and Mission Objectives.
Complete Garage with 100% Kills, Secrets, and Mission Objectives.
Complete Atmosphere Sub-Level with 100% Kills, Secrets, and Mission Objectives.
Kill 50 Humanoid enemies with the Pulse Rifle active.
Complete Atmosphere Sub-Basement with 100% Kills, Secrets, and Mission Objectives.
Complete Queen's Lair with 100% Kills, Secrets, and Mission Objectives.
Complete Living Area with 100% Kills, Secrets, and Mission Objectives.
Complete Canteen with 100% Kills, Secrets, and Mission Objectives.
Complete Meeting Tower with 100% Kills, Secrets, and Mission Objectives.
Complete Leadworks with 100% Kills, Secrets, and Mission Objectives.
Complete Mining and Smelting with 100% Kills, Secrets, and Mission Objectives.
Complete Furnace Controls with 100% Kills, Secrets, and Mission Objectives.
Complete Lead Mould with 100% Kills, Secrets, and Mission Objectives.
Complete Tunnels with 100% Kills, Secrets, and Mission Objectives.
Complete Canyons and Catacombs with 100% Kills, Secrets, and Mission Objectives.
Complete Secrets with 100% Kills, Secrets, and Mission Objectives.
Complete Droplifts with 100% Kills, 100% Secrets, and 75% Mission Mastery.
Complete Egg Chambers with 100% Kills, Secrets, and Mission Objectives.
In "Egg Chambers", Kill 10 Facehuggers as they're hatching.
In "Entrance", Kill 4 Facehuggers in a row without firing any bullets.
Kill a Xenomorph Queen with the Flamethrower active.
Complete Recreation Rooms with 100% Kills, Secrets, and Mission Objectives.