Shout Out / Ghostrunner

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• You can find a sleek red motorcycle with decals leaning against a wall which looks a lot like Kaneda's bike from AKIRA.
• The background soundtrack from the first level of the game, Infiltrator, uses a partial recreation of the track Engineering from System Shock 2.
• One piece of graffiti in Picking Up The Pieces says "We've got a city to burn" in sharp yellow font, taken directly from Keanu Reeves' line in Cyberpunk 2077.
• Another graffiti tag spells out "What a lovely day!", a reference to Nux's line in Mad Max: Fury Road.
• In Pushing The Buttons, there is a pink Fall Guy that you can spot floating in the water.
• Also in Picking Up The Pieces, you can come across a dead man wearing a chicken head mask in a shout-out to Hotline Miami.
• Genji's dragonblade from Overwatch can be spotted in a burning trash can in Whisper In Your Head.
• In Whisper In Your Head, you can come across some junk on the ground whose shadow forms the silhouette of Aku from Samurai Jack.
• In Breathe In, there is a poster depicting the Dopefish from Commander Keen.
• One of the jumbotrons in the upper levels of Dharma City shows a stormtrooper helmet a la Star Wars.
• One of the screens in the upper levels flashes rows of the the text KILL BOSS in red font, a reference to RUINER.
• You can spot a small Ghostrunner toy in Life Support resembling that of a collectible figurine of Doomguy from Doom.
• One collectible item resembles a futuristic Game Boy Advance SP, distinguishable with its flip-to-close screen (which appears to be holographic), volume slider on the left side, and game cartridge insert at the bottom.
• A ton to Blade Runner:
  • The blimp in Faster strongly resembles the Off World News Blimp.
  • One of the collectible items, an employee ID, is a shout-out to the Tyrell Corporation.
  • One of the later levels is named "Things you wouldn't believe", likely referencing the "Tears in the rain" monologue from the movie.
  • The first level of the Project_Hel DLC has the Keymaster ask HEL a series of questions reminiscent of the Voight-Kampff test. To make it even more obvious, at one point the Keymaster says:
    Six. You're in a desert. You see a tortoise... Wait... No, wrong one.
• At some point you can find graffiti on the wall of a sword◊ encircled by a chain, which is a shout-out to God's Trigger, one of One More Level's previous games.
• The achievement for collecting all fifteen swords is called 'A fine addition'.
• The Ghostrunner is a ninja who lost his left arm and was left for dead; he also gets a crude mechanical prosthetic to replace it.
• Mara's design of having mechanical tentacles attached to her body, her occupation as a Mad Scientist, and being enemies to The Hero are all one towards Doctor Octopus.
• In the "Project_Hel" DLC, the Keymaster tests HEL using the "Hanson-Hamada cognitive-motoric test", which like the Voight-Kampff test involves repeatedly asking the subject disturbing ethical questions, which they must answer quickly and instinctively. This being the Keymaster, of course, the "correct" answer is invariably the most violent and ruthless possible option.
• In the Project_Hel DLC, one of HEL's answers to the Keymaster's questions brings to mind a quote by Connor in Detroit: Become Human. HEL says, "I won't die. I am not alive." Connor's line is, "You can't kill me, I'm not alive."
• Another line HEL says after the Bakunin boss battle is reminiscent of the iconic "I never asked for this," quote spoken by Adam Jensen in Deus Ex: Human Revolution.
  Bakunin: You never should have existed!
  HEL: I never asked to.

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