Comet - Get the Gold the Shock Trooper medal by getting "X" First Blood ribbons. Its effect is as you Roadie Run, you build up energy until you ignite into a ball of fiery death. Impact an enemy to unleash your power.
Instagib Melee - Get 200 kills with the Wretch in Beast mode. Its effect is every melee hit you deliver is packed with explosive power.
Super Reload - Get the Bronze Master-At-Arms medal by getting a Bronze medal with all five starting weapons. Its effect is all perfect active reloads will greatly increase your weapon's power and double its clip size.
Infinite Ammo - Get 100 Combat Engineer ribbons. Its effect is starter weapons and pistols never run out of ammo.
Big Explosions - Get 100 Hail Mary ribbons. Its effect is the radius of all explosions are increased to frightening proportions.
No Ammo Pickups - Unlocked from the beginning. Its effect is ammunition reserves have been exhausted. You must scavenge from weapons left on the battlefield.
Enemy Regeneration - Get the Silver Aficionado medal by playing "X" chapters in Arcade mode. Its effect is non-Lambent enemies regenerate health over time.
Vampire - Get 100 Executioner ribbons. Its effect is your health does not automatically regenerate, but every point of damage you deal will heal you.
Must Active Reload - Get the Silver Active Reloader medal by getting 2,500 Perfect Active Reloads. Its effect is every reload must be an active reload or your gun will jam.
Friendly Fire - Successfully complete the campaign in 4-Player Co-op. Its effect is your teammates are no longer protected from team fire.
Big Head - Get the Gold Horder medal by completing "X" waves in Horde mode. Its effect is everyone has their head (and other key features) inflated to comical proportions.
Pinata - Get the Gold Investor medal by earning "$X" in Beast mode. Its effect is special tokens drop from every kill; collect them to earn points.
Flower Blood - Get the Silver King Of COG medal by earning "X" points in Arcade mode. Its effect is all blood effects are replaced by pretty flowers.
Headless Chicken - Unlocked from the beginning. Its effect is enemies attack each other for several seconds after they lose their heads.
Laugh Track - Successfully complete the Standard and Arcade campaign, Beast mode, and Horde mode on the Casual or higher difficulty. Its effect is for every kill, you will recieve some laughs. It is like an M-Rated sitcom.
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