EvilSlayer

EvilSlayer is about a world where a disease of unknown origin causes many people to disappear or mutate into monsters driven to kill and eat. Survivors form resistance and self-defense organizations to fight the monsters and stay alive.

You control the protagonist in battles, using bullet hell attacks to eliminate enemies. You can acquire and upgrade additional weapons during combat to improve your fighting abilities. When your stamina runs out and your HP reaches zero, you return to the base to upgrade your abilities before heading back into battle.