The good news though is Unigine is preparing an updated version of Heaven to be released during the Game Developers' Conference (GDC). Details about the improvements are slim, but we are told it's a "heavy" update.
There is also other good news coming out of this Linux-friendly game engine company. We previously mentioned Primal Carnage as a dinosaur game coming to Linux and this morning it's been publicly announced that Primal Carnage is in fact using the Unigine Engine. Primal Carnage is going to be released later this year atop this beautifully advanced game engine with full Linux support. Details are mentioned in this Unigine press release.