Phantom Breaker: Omnia

metacritic.com:

Phantom Breaker: Omnia, a massive update to Phantom Breaker: Extra, a 1-vs-1 2D anime fighter originally released by Mages in 2013. The game features 2 guest characters, Kurisu Makise from Steins;Gate and Rimi Sakihata from Chaos;Head, as well as two brand new characters created specificallyPhantom Breaker: Omnia, a massive update to Phantom Breaker: Extra, a 1-vs-1 2D anime fighter originally released by Mages in 2013.

The game features 2 guest characters, Kurisu Makise from Steins;Gate and Rimi Sakihata from Chaos;Head, as well as two brand new characters created specifically for Phantom Breaker Omnia.A mysterious man, known only as 'Phantom' appeared in Tokyothe capital city of Japanand manipulated vulnerable adolescents into fighting each other, bestowing upon them mystical weapons of great strength known as 'Fu-mension Artifacts.' In exchange, he promised to grant their wish if they survive.Unbeknownst to the combatants, the fierce clashes between Fu-mension Artifacts caused distortions in space-time, which compromised the boundaries between parallel universes. The collapse of these parallel universes would ultimately break the seal, unleashing Phantom's destructive powers.