We gathered that Life Is Strange is coming to Linux from all the recent SteamDB activity, but it looks like Feral Interactive are the ones behind it.
Looking at this change on SteamDB shows clearly who is doing it (I know it's for Mac, but Linux & Mac port hints popped up at the same time on SteamDB):
rootoverrides/0/addpath: Feral Interactive/Life Is Strange/VFS/Local
I know some ports like BioShock Infinite have been ported to Mac/Linux by different people, but that was an unusual case.
We also have the fact that Feral Interactive are announcing/possibly releasing something soon going by their recent twitter teaser. Feral Interactive also have the newer upcoming port radar entry too.