Raiden V's Facebook Like "Co-Op" System
I'm a huge SHMUP fan, specifically Raiden II is my all time favorite. I've been a fan of the series and have purchased every iteration I can think of - from the officially numbered games to the Fighters and Aces spin-offs too. Raiden V is the first totally new game in the series in almost 10 years. It's also what might be the biggest departure I've seen.