For the first time since releasing in September of last year, Ian MacLarty and Jon Kerney’s fantastic behind-the-back runner Boson X ($2.99) is currently free on iOS. We loved the look of Boson X since we first laid eyes on it prior to it being released. The premise is that you’re a scientist running through a particle accelerator, leaping from platform to platform while avoiding falling into the gaps, and running across the glowing platforms to hit an energy threshold that lets you move on to the next level. It’s proudly inspired by Super Hexagon both in its look and the fact that you’re rotating a giant angular shape by tapping either side of the screen. Though Boson X is based on a decagon as opposed to a hexagon.

Anyway, once Boson X finally released it really lived up to expectations, and even smashed right through them. We easily awarded it 5 stars in our review as well as our nod for Game of the Week the week it came out. Behind-the-back runners are so “meh" at this point, but Boson X managed to bring a totally fresh perspective to the genre with unique mechanics, a hearty dose of challenge, and a level-based structure that felt much more meaningful than all the other endless runners out there. Also worth mentioning is that back in June, Boson X was updated with 6 new levels, effectively doubling the size of the original game. And there are no ads or IAP to speak of. Basically, what I’m getting at is that Boson X is amazing and currently free, so you should download it immediately.