Force a Stalker to go into hiding.

Let a Defender get obliterated by lasers in the Decontamination Zone.

Use the prototype sonic weapon in the Acoustic Weaponry Lab.

Decontaminate a Defender to death in the Augmentation Chambers.

Win every optional battle of Security Breach.

Make it through the Decontamination Zone.

Defeat your first Stalker.

Complete the Disaster Area episode.

Kill an enemy marked by Warden's tag ability.

Collect 100,000 dollars.

Collect 95% of all lootcrates.

Have Scarlett reach experience level 10.

Pet Luna.

Collect 50% of all audiologs.

Beat the game on Medium difficulty or higher.

Have a hacked enemy kill another enemy.

Complete the Abandoned Housing Block episode.

Complete the Metro Central episode.

Eliminate 5 enemies in a single turn.

Eliminate an enemy by standing next to them with an active sticky bomb.

During a single combat arena, survive total damage equal to 150% of the attacked...

Get an enemy killed by luring them onto a proximity grenade or a burning tile.

Collect 95% of all audiologs.

Deal enough damage to an Ogre so he dies without entering his Regeneration cycle...

Complete 50% of all optional combat arenas.

Use enemy death explosion to kill another enemy.

Complete the Amber Harbor episode.

Sign 5 sponsorship contracts.

Sign 95% of all autographs.

Have Scarlett reach experience level 20.

Collect 50% of all lootcrates.

Complete all optional combat arenas.

Complete the Industrial Zone episode.

Beat the game on any difficulty level.

Kill an enemy while concealed by the invisibility skill.

Beat the game on Hard difficulty.

Fool an enemy into aiding Tybalt.

Kill 200 enemies in a single playthrough.

Defeat Ulysses.

Sign 50% of all autographs.

Use Scarlett's melee attacks to eliminate 3 enemies in a single round.

Use healing smoke to heal 2 or more Challengers.

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