Looking for a specific anime

1. It was a film, not a series.
2. It was hyper-realistic computer-generated animations.
3. It was set in the future in a major city.
4. It was a "game" where a team of about half a dozen uniformed individuals fought demons throughout the city. Every member of the team was dead and whoever won the game got to return to the living world.
5. One of the demons was a gigantic moaning, rolling head that rolled over the team members in order to eliminate them from the competition.
6. At the end of the movie, all the demons combined to form a final "super" demon final boss.
7. At the end of the movie, the person who won the competition sacrificed their ability to return to real life so that another member could return to their life.
8. I watched this on Netflix around 2019.

Please. Help! What is the name of this animations?