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... :-)

Chaos Reborn, a turn-based strategy-game from the designer of the original X-Com, ist now available for Linux on Steam.

Description:

From the designer of the original, award-winning XCOM game comes Chaos Reborn - a fast paced, turn-based wizard combat game with strategic Realm Quests. Blob your enemies with Gooey Blob, summon entire forests of Shadow Trees, or ride a Manticore into battle. Be a wizard hero!

Mu Complex, another "Hacking-Game" like Uplink, Hacknet, or Hacker Evolution, is now available for Linux on Steam.

Especially interesting: you'll use real life Linux terminal commands.

Description:

Play as a hacker and take control of an ultra secret company to reveal the darkest secrets. But beware, you seem not to be alone and what you will discover could change the world...

Featuring a fulfilling storyline, will you save Lya?

The Developer of Empire TV Tycoon pulls back his recently released Linux-Version from Steam.
The SteamOS/Linux-Icon has also already disappeared from the shop-page.
Without further explanation, he posted this in the Steam-Forum:

Linux is not supported
Only supported OS are Windows and Mac