Gantz: O (2016)

In the heart of Tokyo lies a mysterious room housing a cryptic black sphere. Those who should have met their demise elsewhere find themselves transported to this enigmatic space. Here, the sphere bestows upon them extraordinary suits and weaponry, entrusting them with a mission: eliminate alien threats on Earth. These covert missions unfold unbeknownst to the world at large, with survival being a rare feat. The orchestrator of these perilous endeavors is none other than the unforgiving entity known as Gantz.