Described as "A metaphysical thriller", the game follows Malachi Rector, an evaluator of antiques with a "photographic memory and genius for history". Asked by a secret government agency to investigate the life of a dead woman, he discovers a level to history, even to space and time, deeper than he had known.
Moebius contains examples of:
- And Now for Someone Completely Different: Control temporarily switches over to David during Malachi's first panic attack. The player also controls David for part of the last chapter, when he and Helene are escaping Qatar.
- Awesome McCoolname: Malachi Rector.
- Badass in Distress: David gets abducted near the end of the game. By the time Malachi can come to the rescue, he's partway through escaping with the help of Helene.
- Expy: An important plot element, as people being just like specific historical figures is the crux of the plot.
- Fun with Acronyms: A secret government agency named "Future Intelligence Technology Agency" (F.I.T.A.).
- Incredibly Lame Pun: Some of David's jokes consist of these.
- Living Emotional Crutch: David serves this role for Malachi, helping him control his panic attacks and become less of a Jerkass.
- MacGuffin: The whiskey Malachi buys late in the game is called MacGuffin whiskey.
- Man of Wealth and Taste: Malachi is wealthy enough such that some things in the game are explained by him simply buying them, and he has strong opinions on taste.
- Photographic Memory: A skill possessed by our protagonist, and one that apparently proves quite useful in evaluating antiques.
- Psychic Nosebleed: Malachi suffers from these when he purposely uses his abilities at the end.
- Quintessential British Gentleman: Malachi is British, and very very cultured.
- Roaring Rampage of Revenge: Malachi goes on one after David is kidnapped. He does quite a few things that he normally wouldn't, like holding a knife to someone's throat, and trudging through murky tunnels.
- Sherlock Scan: Malachi does this to all antiques and people he sees, represented by mini-games of guessing or matching specific traits to things in his photographic memory.
- Spiritual Successor: To Cognition: An Erica Reed Thriller for being written by Jane Jensen, using the same (slightly buggy and awkward) engine, having a lot of detail in furniture and decorations, and an emphasis on psychic powers.