There are a ton of unlockable parts, weapons, suits, and modes in Dead Space 3. Here we've detailed every single unlockable in the game. All you have to do is complete the requirements and you should see a message stating what you've unlocked. First up, beat the game on...
Casual - New Game+, Dead Space Legends Suit Set, +3 CLP Circuit Set
Normal - New Game+, Dead Space Legends Suit Set, +3 RLD Circuit Set
Hard - New Game+, Dead Space Legends Suit Set, +3 SPD Circuit Set
Impossible - New Game+, Dead Space Legends Suit Set, +3 DMG Circuit Set
Optional Missions Complete
10/10 - MK-II Overclocked Frame Set, Hostile Environment Suit
Collect All Artifacts - MK-II Overclocked Tip Set, Flight Suit
All EarthGov - EarthGov Circuit Set
All Unitology - Unitology Circuit Set
All SCAF - SCAF Circuit Set
All Alien - Alien Circuit Set
Collect All Logs - MK-II Overclocked Module Set
All Text Logs - Research Circuit Set
All Audio Logs - Comms Circuit Set
All Weapon Parts - Crafter's Circuit Set, Deep Dig Suit
All Blueprints - Builder's Circuit Set
All Circuits - MK-II Overclocked Attachment Set
Beat NG+ Classic Mode - Unlock Devil Horns
Beat NG+ Pure Survival Mode - Unlock MK-II Overclocked Parts Set, Mega Resources deposit
Beat NG+ Hardcore Mode - Unlock Retro Mode
Explore the galaxy in the franchise's first open-world game.