Unlockables

Galleries

Boss Gallery 100% of Logbook Scans
Character Gallery 60% of Logbook Scans
Creature Gallery 80% of Logbook Scans
Dark Samus Ending 100% of Items Obtained
Promotional Gallery 40% of Logbook Scans
Rough Sketch Gallery Complete game on Normal Mode
Samus Body Suit Cinema 75% of Items Obtained
Storyboard Gallery Complete game on Hard Mode

Hard Mode Beat the game

Unlockable Multiplayer Bonuses

Dark Echoes Soundtrack Complete the Game
Darkness Soundtrack Complete the Game
Luminoth Soundtrack Restore Energy to Agon Temple and talk to U-Mos
Pipeline Arena Restore Energy to Torvus Temple and talk to U-Mos
Pirate Fear Soundtrack Restore Energy to Agon Temple and talk to U-Mos
Sanctuary Soundtrack Restore Energy to Sanctuary Temple and talk to U-Mos
Spires Arena Restore Energy to Sanctuary Temple and talk to U-Mos
Torvus Bog Soundtrack Restore Energy to Torvus Temple and talk to U-Mos

Unlocking 2 new multiplayer levels - All you guys have to do here, is beat a couple bosses to recieve these multiplayer levels.

Pipeline Multiplayer level Defeat the boss on Torvus Bogs.
Spires Multiplayer level Defeat the boss of the Ing Hive (aka Fortress)