If You complete the indicated task You'll get the allotted gamerscore.
Immortal (75) - Complete every level on any difficulty without dying.
Treatment (50) - Kill 300 opponents in any Multiplayer game mode.
Lucid Guardian (45) - Complete Story mode on the Insanity difficulty.
Untouchable (30) - Kill 10 opponents in a row without dying in a Multiplayer game.
Prescription (30) - Kill 100 opponents in any Multiplayer game mode.
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How to Unlock
Absolute Threshold - Achieve the Gold weapon upgrade rank on the Insanity difficulty.
Astraphobia - Complete one level in Story mode while only using Shock Therapy.
Aversion Therapy - Complete a level on any difficulty without dying.
Bomber - Kill 100 Enemies while using the Dream Cleaner.
Breaker - Kill...
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