The 2.5GB heavy Community Pack #1 for Sword Coast Legends is now available for Linux on Steam.
It includes a lot of bugfixes and improvements (like new skill trees), but also many new items for the "Dungeon Master"-mode.

Here are the Release-Notes:

Companion Skill Trees: Players who complete the various SCL companion quests within the player campaign will gain access to unique companion specific skill trees for use on their characters.

Since today is the official release of the Steam Machines, Valve has started the Steam Machines Launch Sale.
From A like Alien Isolation to X like XCOM: Enemy Unknown you'll find many discounted Linux-games.

The Fall of the Dungeon Guardians, a game inspired by Dungeon Master, is now available on Steam for Linux.

Description:

The Fall of the Dungeon Guardians is an RPG Dungeon Crawler game, in First Person View, inspired by classics like Dungeon Master™ and Might & Magic®, but featuring a modern combat system based on the triptych “tank/damage dealer/healer” mechanism.

Trine 3, the graphically very pleasing successor to Trine 1 and 2, is now officially available for Linux on Steam and GOG.

The game now also includes a completely new additional Level and is currently at Steam on Sale.

The first big patch for Wasteland 2: Director's Cut has just been released. It fixes a lot of bugs, which were troubling players since release.
For example: some party-members -if dismissed- did never return to the HQ and were lost forever.

Here are the extensive Release Notes of this patch:

Wasteland 2: Director's Cut Patch 1 Release Notes

The Steam Halloween Sale 2015 has begun!
It lasts until 02.11.2015.

Vertiginous Golf, a steam-punk themed minigolf-game, is currently available free of charge on Steam.

If it's a temporary campaign, or even an error, is currently unknown

So: get it while you can... :-)