For those that don't remember Dilogus, since it's name isn't exactly easy to remember or catching, it's a forthcoming title built upon the Unigine Engine and will feature a native Linux client. Dilogus was announced last December and its development continues in a steadfast manner.
Dilogus is not another first person shooter (or a strategy game like Unigine's own OilRush title), but it's a fantasy RPG game. Originally this game was supposed to be built upon the Crysis/Crytek Engine, but was then switched to being Unigine-based and word of a native Linux client.
From the original press release, "It's a third person High Fantasy RPG action game that immerses players deep into the awe inspiring fantasy world of Dilogus, allowing them to experience it from multiple perspectives of six unique characters in both single player and co-operative multiplayer mode on Linux and Windows platforms."
What's new in the Dilogus world now is their first official in-game screenshot (shown below) and new information that is shared on their development blog.
There will be a pre-order for this game -- in a similar manner to Unigine's OilRush -- at some point when the game is ready to ship for Windows and Linux platforms.