Its a real hidden gem. I wasnt expecting much because usually digital adaptations of board games are not that great as a video games, but this one (and Root) are absolutely amazing. Graphic and animations are good, music is atmospheric, world is interesting and gameplay is highly addictive. Dont forget to try different classes! Side note: it really reminds Etherlords. Good old days!
GOG version of Spellforce 3 Fallen God does not register previous games, so you cant combine races from Soul Harvest in custom games. This is not an issue in Steam version. Devs sold unfinished, broken product on GOG. I highly recommend you to avoid getting Spellforce on GOG.