Destiny, the next game to come from Halo creators Bungie, was nearly a very different IP according to the studio.
In a recent interview with OXM Bungie's Joseph Staten revealed that a whole plethora of ideas were considered - from fantasy to something more modern - before finally settling on the idea that was revealed to the world last month.
"We thought of a good handful of other genres as well. We've had a pretty long pre-production period and we explored everything from straight-up fantasy to something a little bit more modern to many, many other things as well," Staten revealed.
He then added: "Ultimately we gravitated towards this mix of science fiction and fantasy because it gave us this freedom. You saw small things like the prevalence of cloth in the game, a lot of characters have capes or cloaks and the combatants have cloth as well. Fantasy brings us this texture that we can wrap around sci-fi, which is really appealing, especially if you're an artist who's just been stuck making straight up space armour for ten years. A bit of cloth is very refreshing."