Skellow

Taurus Tumbles Complete the Titan levels

Terminal Velocity Complete the Cronus mission (Trinidad ending)

The Big Bang Complete the Cronus mission (Beale ending)

Hotshot Pilot Finish the Cronus mission on Hotshot

Ace Pilot Finish the Cronus mission on Ace

Insane Pilot Finish the Cronus mission on Insane

Double Dipper Finish New Game+ (Ace or harder)

Rescue Ranger Recover every cryotube in the Cronus mission

No Stone Unturned Find every secret in the Cronus mission

Omega Man Get 40 kills in each secret level in the Cronus mission

No Time to Save Finish the Cronus mission in under 3 hours of playtime without saving

Embrace the Darkness Complete Phoebe Refinery without using the Headlights or Flare

Lost and Found Give the Hologuide a command in 5 different Cronus mission levels

Pathfinder Complete the Cronus mission without using the Hologuide at all

Pacifist Complete a Cronus level without killing any operators (Rookie or harder)

Rear View Finish a Cronus level flying only backwards (no sliding or forward movement)

The Kulas Kill yourself with a devastator 10 times

Restricted Mode Finish the Cronus mission without upgrading anything

Flyin' Solo Finish a Cronus level without picking up a single powerup (except keys)

Missile Phobia Max out all secondary ammo at the same time

Third Street Break every monitor in the Cronus mission

Awesome Aggression Get 100 kills in Challenge Mode Countdown (Hotshot or harder)

Goblin King Get 100 kills in Labyrinth

Just Practicing Get 500 Challenge Mode kills on Trainee

Killing Spree Get 20 consecutive Challenge Mode kills without taking damage

Nearly Impossible Get 100 Challenge Mode kills on Insane

No Dead Cats Finish 5 Cronus levels without finding any secrets

Not Bad Score 100,000 in Challenge Mode on Rookie

A Real Challenge Score 100,000 in Challenge Mode on Hotshot

Are You Insane? Score 100,000 in Challenge Mode on Ace

Untouchable Destroy every operator in a Lockdown without taking damage (Rookie or harder)

One Hand Tied Get 50 Challenge Mode kills in one session without firing a primary (secondary/smash only)

Unarmored Get 500 Challenge Mode kills on Rookie

Ahimsa Complete Challenge Mode Countdown with 0 kills (Rookie or harder)

Run or Die Survive to the end of Countdown (Ace or harder)

Infinite Forever Get 100 Challenge Mode Infinite kills on every level (Rookie or harder)

Unbreakable Score 50,000 and survive to the end of all Challenge Mode Countdown levels (Rookie or harder)

Robocide Destroy 1000 operators

Fully Loaded Fully upgrade every weapon and missile in the Cronus mission

Demo Derby Smash 10 operators in one level

Bright Light! Bright Light! Destroy an operator using only Flares

Prime Helix Complete a mission on Heroic difficulty without a Space Marine being killed

Chapter Master Collect everything in the Codex

Emperor's Finest Collect all Space Marines

Omnissiah's Chosen Collect all non-Weapon Wargear

Master of Relics Collect all Weapons

Brothers of Macragge Collect all Ultramarines' Space Marines and Wargear

Brothers of Baal Collect all Blood Angels' Space Marines and Wargear

Brothers of Fenris Collect all Space Wolves' Space Marines and Wargear

Altar of Knowledge Collect all Miscellaneous Wargear