Overgrowth is the game developed by Wolfire that was announced nearly four years ago as a third-person action game that is still considered to be in an alpha/preview state. Overgrowth was announced for Windows, Linux, and Mac OS X platforms. The Linux port of this game began last year by a Wolfire contractor (Edward Rudd), but finally there's some good news to report on the Linux progress.
According to a Phoronix reader, Seon-Wook Park, those that have pre-ordered Overgrowth were informed through their private forums yesterday that the Overgrowth Linux port is nearly ready. Besides the native port, Overgrowth is now working under Wine too, per this WineHQ.org AppDB entry. Pre-ordering comes at a cost of $29.95 USD but includes DRM-free alpha access to the game.
While Overgrowth has been described by the company as a "spiritual successor" to Wolfire's earlier Lugaru game, which was open-sourced as part of the original Humble Indie Bundle, this game is using a new engine. Overgrowth's game engine is called the Phoenix Engine and offers a superior feature-set to what was found in Lugaru. Below are some of the videos showing off the Overgrowth game that's soon to be out on Linux.
Additional information on this multi-platform action game is available from the Wolfire web-site.