* LoopingLines: Daniel Cudmore played Master Chief in the suit while his lines were dubbed over by Alex Puccinelli.
* NoStuntDouble: Daniel Cudmore had to perform all of Master Chief's stunts himself (despite not being a trained stunt performer) because there was only one suit and it was custom-fit to his body.
* TheOtherDarrin:
** Master Chief is voiced by Alex Puccinelli rather than Creator/SteveDownes.
** The contemporary appearance of Lasky was done by Canadian actor Ty Olsson, who also performed motion-capture for ''Halo 4''. However, the in-game appearance of Lasky was based on US actor Jonathan Aub.
* PropRecycling:
** A lot of the special effect CGI models were taken directly from assets made for ''VideoGame/{{Halo 4}}'''s own in-game cutscenes. This can lead to some minor {{Continuity Snarl}}s if a viewer is being picky.
** Cadmon's ODST armor (along with other [=ODSTs=] shown) is reused from the live-action short "The Life", also known as the "We Are ODST" commercial for ''VideoGame/Halo3ODST''.
** The armor worn by [[spoiler: Kelly-087 and Fred-104]] are modifications of the armor worn for the ''VideoGame/HaloReach'' "Deliver Hope" commercial. Amusingly enough, one of the helmet's modifications was attaching the prop of an armored ''knee plate'' over the bottom of the visor.[[note]](''Halo'' {{Cosplay}} enthusiasts had [[NarmCharm quite a chuckle]] when they saw [[http://images.wikia.com/halo/images/f/f7/Kelly_Forward_Unto_Dawn.png the helmet]].)[[/note]]
** All the Warthogs shown are the same prop with different modifications. Said prop Warthog is a fully functional vehicle originally made by Creator/{{WETA}} for the long-abandoned ''Halo'' film. It was also used in the Creator/NeillBlomkamp-directed ''VideoGame/{{Halo 3}}'' promotional short "Landfall".
* SavedFromDevelopmentHell: In a sense. The idea for a ''Halo'' movie had been kicked around for a long, long time, [[http://www.wired.com/gamelife/2012/04/halo-movie-generation-xbox/ but fell through after too much studio bureaucracy]]. Finally Microsoft decided to fund its own movie and the result was this film.