As the title suggests, the 30% loyalty discount for owners of Bullet Soul is set to finish soon, so if you've been putting it off, don't wait too much longer!
http://store.steampowered.com/app/545060/BULLET_SOUL_INFINITE_BURST
Check some of the reviews if you're not convinced:
"Mages with 5pb. really nailed it with this release"
"While I might sound like a broken record at this point, the concept of simple fun exists throughout every aspect of the game."