I tried a bit with Thea: The Awakening
There are at least 3 versions widely available:
- the old early access Linux release (maybe the Mac version is the same one)
- the gold version (windows only), released on boxes (regular for UK and France, Collector for Germany and Poland)
- the current version, updated on Steam and gog
The old Linux one (1.RC5.1118.1) is using Unity 5.1.1f1
The boxed version (1.15.1605) is using Unity 5.3.3f1
Thea - The Awakening 5.4.1p3
I assume that the gog version is still using that one, thanks to darktjm. (the current gog changelog displayed on its forum mentions 1.20.2412 thanks to HypersomniacLive.
Linux very early version aside, I only tried the boxed copy one, and the game launches, the Unity Personal edition appears, same for the cursor, but then the so well named Pink Screen of Death (with audio from the introduction, and buttons while invisible are functional, but then it doesn't make the game playable though).
On a comparative note, with Wine 2.20, the game launches, the Unity Personal logo failed to appear (a little black box in the center of the cyan screen), the cinematic intro works, as it seems for everything except 3D characters don't appear on the map (you only see their spears floating around just like a Mordenkainen's sword :D). It seems to be the same kind of problem Reservoir Dogs: Bloody Days had: no 3D characters displayed (but here, even their weapons are invisible).