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!

Breach & Clear: Deadline, the successor to the critically and commercial successful Breach & Clear, is available now for Linux on Steam.

Description:

A deadly new breed of human monster is on the rise, and it’s up to players to stop the infestation before it spreads. Breach & Clear: DEADline is the all-new follow up to Breach & Clear, the critically acclaimed and commercially successful hybrid tactical strategy game.

The large patch 1.6 including a new tutorial for Age of Wonders 3 is now available for Linux on Steam.

The developer advertised this in the Steam-Forum as follows:

Age of Wonders V1.6 launches, includes new Tutorial

Pandora: First Contact, a turn-based 4X-Game set in Space is now available on Steam for Linux.

Description:

Pandora: First Contact is a science fiction 4X turn-based strategy game on a planetary scale. Our Earth has been exhausted and colonial attempts on other planetary bodies have been in vain. Finally, after decades of exploration, an interstellar probe has brought promise of a new world many light-years away.

Tropico 5, the Strategy-Game from Kalypso, is now available for Linux on Steam!
It even contains cross-platform (Linux, Mac, Windows) Multiplayer!

Description:

Return to the remote island nation of Tropico and expand your Dynasty’s reign from the early colonial period to beyond the 21st Century, facing new challenges including advanced trading mechanics, technology and scientific research, exploration, cooperative and competitive MULTIPLAYER for up to 4 players.