Halo's Forge creation tool, long known for user-generated maps and modes, has quietly spawned two thriving community subcultures: a Formula One-style racing league and an obstacle-course competition modelled on Ninja Warrior. The racing league, run under the HaloTracks governing body via the "haloformula" Instagram account, recreates real-world circuits such as Monaco within Halo, with competitors racing Mongoose vehicles. It highlights how a decades-old console tool continues to generate niche but dedicated fan-run competitive scenes that rarely break into wider view.

The Formula M league traces its roots back 16 years to a Halo 3-era format called HT Le Mans, which used multiple vehicle classes on rough, unprepared terrain before evolving into dedicated racing-circuit builds with Halo Reach's improved Forge mode. Over its last two seasons it has featured 35 drivers, and its Discord community has grown fourfold in six months, from roughly 300 to 1,200 members. Organisers say Halo's vehicle physics are deceptively complex, and a custom game type adds fuel depletion, track limits, pit-lane speed limits and drafting to mimic real Formula One. Separately, Halo Ninja Warrior, created single-handedly by Samuel Burns ("Smokey Massacre"), has built an audience of over 26,000 Instagram followers and nearly 3,000 YouTube subscribers.