Abyssus

It is a pretty interesting game. You play it in co-op, and it is a roguelite where you progress floor by floor against mobs.

There is a range of different weapons that can be obtained in various ways (finishing levels within a time limit, hidden in certain spots on some maps, and so on).

There is also a progression system across the levels, with upgrades to pick.

The game is quite enjoyable and pleasant to play with friends. There are plenty of combinations to try, so the replay value is good.