There are few developers that do what Arcen Games does and, well, here's your chance to finally discover what the thing that Arcen does actually is. For one Humble Weekly Sale you can pay-what-you-want for AI War (and all five of its expansions), A Valley Without Wind 1 & 2, and Tidalis along with their soundtracks, or pay more than $5.80 and also get Shattered Haven and Skyward Collapse complete with its just released Nihon no Mura expansion.