After KURSK released for Windows last month, it just got a big 2.0 update and confirming of a release window for the Linux build.
KURSK is the first ever adventure and documentary video game inspired by real events. You assume the role of a spy who finds way on the Russian nuclear submarine K-141 Kursk. Your task is to collect secret information about the revolutionary Shkval supercavitating torpedoes. While trying to complete your mission, you become witness to the dramatic events which shook the world at that time.
It seems to have released to thoroughly mixed reviews, with all sorts of issues. The big update has reduced loading time, adding in various optimisations, new and improved animations, an improved UI and so on. Sounds like they're really putting in the effort to improve it, which is great. They've confirmed they're working on many more improvements too!
As for the Linux release, Jujubee sent word to us that the Linux (and Mac) build will be available in the "first quarter of 2019". Until then, you can follow it on Steam and wishlist.