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.
Mitsurugi Kamui Hikae features in the documentary, so make sure you check it out.
http://store.steampowered.com/app/494680/
http://store.steampowered.com/app/263620
You can find the full list of sales here:
http://store.steampowered.com/sale/branchingpaths/