Free Play mode:
Complete the game to play any Story mode live in Free Play mode.
Trophies:
Bronze trophies
Co-op Campaigner – Complete any multiplayer level.
Medic! – Purchase the Health Kit Upgrade.
Smackdown – In single player story mode, melee one of each type of alien.
Protectionist – In single player story mode, purchase 5 Hardened Armor items from the Intex Vendor.
Deadly Combo – Kill a stunned alien with a Frag Grenade.
Rocketman – Kill a sentry gun with one rocket.
Pathfinder – Complete a single player level with Waypoiny Display turned off.
Doctor in the House – Heal yourself for 200 hit points using health kits.
Silver trophies
Old Soldier – Complete all single player levels 1-5.
War of Attrition – Kill 1000 aliens in single player.
Vital Statistics – Finish ‘Primed’ single player level with 300000 or more overall score.
Praemonitus Praemunitus – Collect all logs throughout the game.
Survivor – Stay alive for 8 minutes on any of the Survivor mode single player levels.
Rapid Deployment – Complete ‘Cargo’ multiplayer level in 10 minutes or less.
Super-Sleuth – Finall ‘secret’ collectibles.
Deadly Assassin – Without taking damage kill 50 aliens in single player.
Material World – Buy every upgrade.
Lazy – In a multiplayer game, reach the end of a level without dying or firing a shot.
Sentry Duty – In single player, use a sentry gun to kill 20 aliens.
Octo-who? – Defeat Octo-Morph.
Gold trophies
The Best of the Best – Complete all single player levels 1-5 on elite difficulty.
Indestructible – Finish multiplayer ‘Cargo’ level without taking any damage.
Tormentor – Deal 200 damage to one alien.
Speed Freak – Complete Story Mode on elite difficulty with a total time played of 4 hours or less.
Platinum trophy
The Completionist – Earn all Bronze, Silver, and Gold trophies.