I was really enjoying Halo Infinite until I was faced with completing an ultimate challenge.

Halo Infinite's free cosmetic rewards can be earned in two ways. The first is progression along its battle pass, the usual free-or-paid tracks dishing out rewards as you "level up" by gaining experience points from doing in-game stuff--specifically, completing special challenges with requirements like "finish four ranked matches" or "destroy an enemy Wasp three times." The second is by clearing all available challenges in a week to earn the weekly Ultimate reward, a cosmetic item you seemingly can't get any other way.

That second one seems like a fun idea, at least at first. Once you complete all the other weekly challenges, you're faced with one final capstone challenge to unlock your weekly Ultimate. This is a tougher challenge, with a bigger reward of experience points, to really test you.