Wave Engine is Free.

[Yue]

https://waveengine.net



"The idea behind Wave Engine is to develop applications/games natively on a Windows, Mac OS X or Linux machine, and easily run those across every supported mobile device. For example, a game can be entirely developed on a Windows PC and, in the end, may be deployed on iOS. Wave Visual Editor handles such logic, automatically generating the required scaffolding to share a common code base, resources set, etc."

[Steve Elliott]

No excuse for not finishing a game now then mate.  Pick an engine and go for it 

[GW]

I you want free 3d and c#, I think Xenko is a better solution than Wave. It's got a top-shelf renderer and a good editor. The api is a little bit over engineered imo, but it comes from the aaa side.

[Steve Elliott]

Well that's just the problem these days - too many options.

You've just got to pick one that suits you best and not keep switching engines.  Easier said than done.

[Naughty Alien]

..i went trough all mentioned engines...didnt like it..for some reason, there is always some sort of things which forcing you to do things 'their way', which i dislike..but yes..many choices now..closest one to my pick was/is Urho3d