Relive old memories of your escape from the Weapon X Facility

Find and defeat the rampaging beast

Find what you need at Alakalai Lake and have a nice reunion with an old friend

Get the formula and stop the escaped prisoner!

Take down the quantum disruption shield

Defeat Magneto!

Confront and defeat the puppet master!

Complete the Bronze Dog Tag Challenge

Complete the Silver Dog Tag Challenge

Complete the Gold Dog Tag Challenge

Act I: Weapon X: Defeat the enemy commander without attacking him directly

Act I: Weapon X: Complete the level with 8 stealth strikes

Act I: Below Ground: Complete the level with a score of at least 200,000 points

Act I: Freakshow: Complete the level with 8 stealth strikes

Act I: Runt of the Litter: Defeat Sabertooth, using no more than 3 strikes or grabs

Act II: Crash Site: Rescue the soldier before he falls to his doom!

Act II: Crash Site: Complete the level with 10 stealth strikes

Act II: The Lurking Horror: Catch a glimpse of the creature and witness its handywork in the tunnels

Act II: The Lurking Horror: Complete the level with 11 stealth strikes

Act II: Sealed In: Complete the level with 4 stealth strikes

Act II: Grim Discoveries: Satisfy the creature's hunger, killing no more than 3 enemies

Act II: Wendigo's Cave: Defeat the Wendigo without taking damage

Act III: Tactical Decisions: Defeat General Kirby without taking damage

Act III: Tactical Decisions: Complete the level with 29 stealth strikes

Act III: Unfinished Business: Complete the level with 15 stealth strikes

Act III: Ghosts of the Past: Complete the level with a score of at least 500,000 points

Act III: Memories Unlimited: Eliminate all the enemies and clear the exit in the warehouse without scoring more than 2,000 points

Act III: Surprise!: Defeat Sabertooth without taking damage

Act IV: The Lion's Den: Complete the level with 16 stealth strikes

Act IV: Science Area: Complete the level with 5 stealth strikes

Complete Act IV, Parts I-IV with your disguise intact in one session

Act IV: Deep Down: Complete the level with a score of at least 200,000 points

Act IV: Locomotion: Defeat Juggernaut without taking damage

Act V: Magnetic Pull: Successfully prevent Magneto from reaching full power

Act V: Opposites Attract: Defeat Magneto in less than X-Minutes

Collect 60 dog tags and complete the current level to unlock all strikes

Earn a 7x bowling bonus with one slide

Perform every double and triple strike in one session

Collect all costumes

Act IV: Security Alert: Complete the level with 4 stealth strikes

Act IV: Inferno: Reach the end of the droid's range with at least 50% of the droid's shield remaining

Act VI: Death Strikes: Defeat Lady Deathstrike without dropping below 75% health and with at least 5:00 remaining

Kill 7 enemies during a single berserker rage

Collect all Cerebro files