How am I not surprised. Linux game development is rather difficult. APIs change far too much.
Sounds like they have a new publisher that doesn't care to release the game on linux. I don't know how they could supposedly be this far along in the development and be able to swich game engines without a chunk of cash behind them.
Having met them at GDC I have to say I'm disappointed. The unigine code is very well documented and very high quality in my experience. I can understand if they are pushing console development because Unigine is very new to the consoles, and hasn't been approved by MS yet. But lack of support is BS when you have access to the code. I don't see why Unigine should have to pay for development of a port to xbox if they aren't being paid to do it. That is my 2 cents.
That's not the first game that switched to Unreal Engine, others did before like the commerical Nexuiz switched from Darkplaces to UE too. As there are no commerical console games using Darkplaces or Unigine it is very likely that they just want to rely on soemthing proven to work than on a work in progress engine. That will not give more Linux games of course that way... The current UE is most likely using too many 3rd party parts - or the parts that are used for online gaming are not that easy to make compatible between Win+Linux plattform - when you want to override libs for cheating thats even simpler with Linux...
I just sent a PM so haven't yet gotten my money. I like this comment:
"It's funny to notice that between the 29th September (update release) and today, 7 new donators suddenly joined our ranks! ^^
You guys know what to do if you want to attract more donators! :mrgreen:"
And they know how to loose them too.
Not to forget one thing:
You can download and use UDK for free, just when you earn money you have to pay up to 25% to epic. I guess that's fair, compared to that the beginning costs for Unigine are too high, no free SDK. Also UDK is free for education use and so students may get used to it in university projects. This is the part of marketing Unigine still has to learn. A few nice benchmarks are not enough.
Reasons like this are why I never pre-order any thing.
I hope the Linux users who pre-ordered get refunded.