Full Metal Furies is a very fun “beatemup-style” game very much focused on unique character abilities and cooperation. The writing is very funny, and each character operates very different. Currently $5.

Oh, and on the topic of coop games with primarily female casts: Assault Android Cactus is a lot of fun even for people who haven’t played games much. Rather than use a teammate reviving mechanic, players can pick themselves up - but everyone is fighting their timer to complete the mission before their batteries run out. Levels are quick and chaotic. $5.