- Hidden message
Take the first letter of each chapter and arrange them in order to spell out the sentence 'Warren Lies'.

- Challenge mode levels
At the title screen, press Down, Up, Left, Right two times, Left to unlock four Challenge mode levels. If you entered the code correctly, you will hear a sound.

- Expert and Impossible modes
Successfully complete Chapter 10: 'Secrets And Salvation' to unlock the Expert and Impossible difficulty.

- Trophies
Successfully complete one of the following tasks to get a trophy:

Bronze Trophies
Colony Full Of Crazy People	Clear the top score on the 'Medical Bay' Challenge.
Skill - Stasis	Finish any level with at least 80% Stasis Accuracy.
Overtime Sheet	Clear the top score on the 'Extraction Site' Challenge.
Herbal Remedies	Clear the top score on the 'East Grow Chamber' Challenge.
Rising Star	Gain 10 stars on one profile.
Got A Medic	Clear the top score on the 'Life Support Room' Challenge.
Bridge Commander	Clear the top score on the 'Atrium' Challenge.
Laugh It Up Partner	Clear the top score on the 'Mess Hall' Challenge.
Ready For Takeoff	Clear the top score on the 'Shuttle Bay 47' Challenge.
Acquireor's Delight	Acquire all weapons, text logs and audio logs on Chapter 1
No Cop Duty	Clear the top score on the 'Central Plaza' Challenge.
Make Us Whole	Acquire all weapons, text logs and audio logs on Chapter 9
A Star is Born	Finish any level with a 5 star rating.
Need A Towel	Clear the top score on the 'Water Tunnels' Challenge.
Skill - Reload	Finish any level with at least 80% Perfect Reloads.
No Stone Unturned	Acquire all weapons, text logs and audio logs on Chapter 3
Treasure Hunter	Acquire all weapons, text logs and audio logs on Chapter 8
Skill - Accuracy	Finish any level with at least 80% Weapon Accuracy.
Engineer By Trade	Clear the top score on the 'Maintenance Bay' Challenge.
Scavenger	Acquire all weapons, text logs and audio logs on Chapter 5
You Need Glasses Partner?	Survive the shuttle flight with less than 10% of shields intact.
Silver Trophies
Necro Slayer	Finish the game on 'Expert'.
Super Star	Gain 30 stars on one profile.
P-Sec Officer	Finish the game on 'Hard'.
Survivor	Finish the game on 'Normal'.
Gun Dealer	Acquire every weapon on one profile.
Gold Trophies
Isaac 2.0	Finish the game on 'Impossible'.
Mega Star	Gain 50 stars on one profile.
Weapon Nut	Max out all upgrades for every weapon on one profile.
Platinum Trophies
Man Up Sweetheart	Unlock all trophies.

Bronze Trophies
It Needs Our Help	Finish Chapter 1
That's Quite A Mouthful	Finish Chapter 2
Too Much Firepower?	Open the secret weapons store in P-Sec.

- Switching weapons
Normally you cannot change weapons except by picking up new ones. To access the weapon selection screen, quit the game, exit to the main menu, then resume the level. Notice: You will only have the default amount of ammunition for the selected weapon and lose your previous stock. You can only choose one weapon, and will lose the other two special weapons.