Humble Bundle are currently giving away copies of Gone Home in the Humble Trove and let's take a look at some other good deals going currently.
Firstly, Gone Home is free to grab until May 3rd as part of the Humble Trove, a curated selected of DRM Free games that everyone who subs to the Humble Monthly has access to. The free offer doesn't need you to sub to it though of course.
GOG's Weekend Sale has a few nice games available for Linux like PixelJunk Shooter (see Scaine's thoughts on that here), Paranautical Activity Deluxe Atonement Edition, Songbringer and The Coma: Recut.
Alien: Isolation, a fantastic horror game that was ported to Linux by Feral Interactive is also super cheap right now due to the 40th anniversary of Alien. You can find it for 75% off on Humble Store and Steam. Feral's own store also has it on sale but not as cheap, your choice if you want to give the porter a little more.
Fanatical have a good deal going on Tabletop Simulator, a surprisingly good board game physics sandbox. I've played quite a lot of different games with it and I'm constantly surprised by it. It's 57% off although not for long and in limited amounts.
For those of you making good use of Steam Play, Valve have a Capcom sale going with titles like MONSTER HUNTER: WORLD (Gold rating on ProtonDB) and others going cheap. Valve also have Transport Fever super cheap with 70% off to celebrate the announcement of Transport Fever 2. Dying Light Enhanced Edition, one of the best Zombie games I've ever played is also 70% off on Steam - it has a native Linux port but when you run it with Steam Play the performance is much better!
Think people need to know about a good deal? Let everyone know in the comments!