History NightmareFuel / Marathon

* At one point in ''Durandal'', you get captured by the Pfhor. The resulting chapter screen shows what is presumably either a [=BoB=] or ''you'', bloodied and clamped down, face messily removed to the unveiling of circuitry beneath and what looks to be a device coming in from behind ready to continue some ColdBloodedTorture. Welcome to the Big House, and apparently this was at least one of the Security Officer's traumas in ''Infinity''.

** And their messages are being commed directly into your helmet...

* The "dream" levels in ''Infinity'', especially the messages you find in them, which may or may not be describing the Security Officer's life prior to serving on the ''Marathon''. The first terminal involves him encountering a hulking giant of a man armed with a double-bladed knife; this man proceeds to have a seizure right in front of the Officer, choking out "durability" in-between puking. Watching all of this is a gang of black-suited men. The Officer, as scared out of his mind as anyone else in his situation would be, takes the double-bladed knife and runs for it.

* The Pfhor Empire's ultimate weapon, the ''trih xeem'', is essentially a ''solar-system buster'' that they deploy if a colony or area of interest is proving too difficult to subjugate. There's no telling how often they've resorted to it, and if Durandal essentially taking the Security Officer and S'pht and fleeing Lh'owon at the conclusion of the second game is any indication, there's no way of actually stopping the damn thing once it's launched towards the system's sun.

** To say nothing of the Security Officer himself. The amount of CruelAndUnusualDeath and LudicrousGibs this guy leaves in his wake comes across as more than a ''little'' bit unsettling. For a little bit of gravitas, look back after you've finished a combat encounter, especially if you'd primarily [[GoodOldFisticuffs used your fists]], and let it sink in. And there's [[VideoGameCrueltyPotential nothing stopping him from slaughtering fellow humans]], besides them potentially fighting back in the second game, meaning there's nothing stopping the other cyborgs from letting loose with no care for collateral damage if it means taking down the Pfhor.
** The capper, as pointed out in WebVideo/MandaloreGaming's video covering ''Infinity'', is that the Battleroids (or at the very least the Security Officer) are stuffed full of '''''[[TouchedByVorlons Jjaro tech]]'''''—of which causes the human mind to potentially begin experiencing Rampancy much like an AI in the series (which thematically fits as each chapter name in ''Infinity'' are synonyms to the three stages of Rampancy, reflecting the Security Officer's own journey) that causes them to progressively become a RealityWarper that can [[DimensionalTraveler dimension hop]] through time and space due to integrating closer to [[DeityOfHumanOrigin the quantum mechanics that make up the universe]]... and the people who made them are unaware that they had accidentally created nigh-omnipotent, [[ResurrectiveImmortality near-immortal]] gods that can exist anywhere, capable of altering fate even against an EldritchAbomination that threatens ''all'' space-time by just ''existing''. Hell, just the revelation alone that the Security Officer is travelling between timelines is enough to send the [[SmugSnake overly smug Tycho]] into a full-blown VillainousBreakdown out of a mixture of existential horror and sheer rage all at once.