There are collectibles in the game that are references to Bethesda Softworks' previous games. After finding them, they can be viewed in Sebastian's Room.

• Mysterious Mask - Corvo Attano's mask from Dishonored.
• Mysterious Machine - Panzerhund's model from Wolfenstein: The New Order.
• Mysterious Weapon Rebplica - Rocket Launcher model from Quake.
• Mysterious Bobblehead - Vault Boy bobblehead from the Fallout series.
• Mysterious Action Figure - Doom Marine/Doomguy action figure from 2016 reboot of the Doom series.
• Mysterious Symbol - Ouroboros symbol from The Elder Scrolls Online.
• Mysterious Mug - TranStar mug from 2017 reboot of the Prey series.
• Mysterious Toy - The Keeper toy from the game, The Evil Within.