To celebrate the release of "Branching Paths". a documentary exploring the usually unseen world behind the Japanese indie scene has been released. The titles featured in the documentary are currently on sale.
Magical Battle Festa features in the documentary, so make sure you check it out.
http://store.steampowered.com/app/494680/
http://store.steampowered.com/app/292480
You can find the full list of sales here:
http://store.steampowered.com/sale/branchingpaths/