We were teased with an image of Darksiders running on Linux from the official Twitter account, dated July 11th, 2014.

http://archive.is/L3udP

With the following post.

Originally posted by Reuben Swartz:

Awesome!!! Any ETA on the port?

Originally posted by Reinhard Pollice:

soon. We Want to obviously make sure its in good shape.

http://archive.is/dJdml

Then, on November 5, 2015 we got an update on GamingOnLinux.

The Darksiders 1 port is actually 98% done with only some bugfixing left. Unfortunately it remained in this state for a while as we had to focus on other things.

For Darksiders 2 Deathinitive Edition we have a Linux port on our list but cant give a timeframe right now.

http://archive.is/dquhZ

After over a year it still was not released.