checked-no =>Art Galleries: Various art galleries can be unlocked by filling up your scanning logbook. * 40% - Promo Art * 80% - Creature Art * 60% - Character Art * 100% - Boss Art =>Hard Mode: Beat the normal game once to unlock the hard mode. =>Rough Art Gallery: Beat a normal mode game to unlock this art gallery. =>Storyboard Gallery: Beat a hard mode game to unlock this art gallery. =>Alternate Endings: There are three endings possible, depending upon how many items you've picked up during the game. If you've collected less than 75% of all the power-ups, you'll get the standard ending. If you collect 75%, you'll get to see Samus remove her suit. If you collect 100% of the items, you'll get an extended Dark Samus ending. =>Multiplayer Features: Extra maps and music can be unlocked in the multiplayer mode by completing requirements in the main game. * Luminoth Soundtrack: Talk to U-Mos (the alien guardian). * Pipeline Arena & Torvus Bog Sountrack: Restore energy to Torvus Temple and talk to U-Mos. * Spires Arena & Sanctuary Soundtrack: Restore energy to Sanctuary Temple and talk to U-Mos. * Pirate Fear Sountrack: Restore energy to Agon Temple and talk to U-Mos. * Dark Echoes/Darkness Soundtracks: Complete the game.