So, some of you may have already seen (and played) this, but still sharing in case you didn't. I've found it at random, while browsing around for 2hu stuff.
This chinese guy is planning to develop a souls-like game (with Unreal 4) with Touhou characters. For now, there is only a test demo boss battle between Reimu and Remilia, but more is going to come maybe, the author is still considering if continuing this or not. It is pretty nice, in my opinion.
Warning: since it's only a test demo, some stuff needs to be fixed/adjusted (the battle is a bit unbalanced - Remilia is too strong, movements are not the best, the range/hitboxes needs improvement etc) so don't expect something amazing. Still, a good starting point. And it has Xbox controller support.
Download it here: https://mega.nz/#!4MwwBK7A!nGJlgzQjy_pDIzH2NN8GKJOmW3PgPsguS-RKaQxMhaM
Video related is the author himself beating it (reposted by someone, original is at the author's account on bilibili.com).
By the way, downloading this was a NIGHTMARE. This guy used as a host pan.baidu.com, which is something like Dropbox. So you need to be registered and to use their program to download stuff. So I basically had to understand how the hell I was supposed to sign up - still hard even with Google Translate, and how to use the manager application - still in chinese. Damn.