Otro más a la lista de juegos cooperativos que jugué solo y me aburrió rápido.

Definitely one of the better co-op shoot em ups out there. Started really rough but over time has become quite solid. Upgrades feel good, getting to max level feels good, and there's a lot of endgame content that's based on skill and teamplay rather than gear. All classes feel distinct and fun to play. There just needs to be more mission types and incentives to grind and they can have a perfect game on their hands.