The game itself is great, and the Fallen God expansion adds a very interesting faction to the game. You should buy it, just not on GOG. Currently the GOG version is far behind the steam version, and you are unable to play with all the factions because of it. If you play Fallen God you cant play with the earlier expansions Factions, and vice versa.
Buy it on steam if the game looks interesting to you. Or try the versus Edition for free on steam. It has the base races and gives a good glimpse of what the game is.
Fallen God is a new standalone expansion to SpellForce 3 (itself a great RTS+RPG hybrid) that allows you to play as a new faction, the Trolls, and makes superb use of its original theme.
Again, the developers maintain the high level of quality and care of the previous installments, so you can count on great graphics, sound and art direction and truly outstanding writing, voice-acting and music.
The star of the show is doubtlessly the uniquely-themed, involved campaign were you are made to empathize and appreciate the unique culture of the Trolls.
This time around, it revolves around a fixed faction and a closed group of characters, which I think works as a strength, as they each are developed with depth and care. The characterization in particular is truly great, as the all-too-real personalities of your trollish companions interact and conflict.
The feeling of sadness and despair punctuated by humor and humanity of the characters makes for a unique experience, and the general theme is skillfully and humorously exploited (e.g. the trolls have no use nor recognize the value of the unique items you find in previous installments, so they just break them and scrap them up for materials).
Sadly, for me the (otherwise great) ending had a rather cruel streak that was a tonal shift and detracted from the rest of the experience, but not all may agree.
On the "minus" part, the "streamlined" (i.e. dumbified) RTS+RPG model of Soul Harvest makes a return (no carts, worker/carrier, material refining, multiple resistances, etc.) , so don't expect the more interesting RTS or RPG models of the original campaign. The RTS also retains its rush friendly nature.
Those faults, however relevant, don't really detract considerably from the general experience (though they deprive the game from reaching its full potential), so, again, this an easy recommendation for me, and a truly unique game both for its mechanics and theme.
Camapaign: trolls constanly talking about their feelings and self doubt, VERY wordy.
Rts: like all spelllforce3- no improvement over prevoius games to jank gameplay (especialy unit ai witch feels worse than spellfoce 1 nad 2) instead adding active abilities to units making the whole experience chaotic at best. whats different: training military units for trolls requires more apm and attention so have fun I guess.
Deep sale (what I did) or pass.
Spellfoce 1 and the expansion still best in the series.
SF: Fallen God works similar to Soul Harvest. Reduced damage types. 2 skilltrees per hero, one of which is preset per character and a synergieskill depending on the trees chosen. Ressources get stored globally instead of in each sectoroutpost separately and the units feel distinct from one-another.
The story follows the trolltribe of the Moonkins. They are currently on the run from hunters and fighting for survival. For that they try to revive a Fial Darg, the titular "Fallen God". This story feels less cosmic and less of a strech than the Soul Harvest one. It fits a lot better into the world of SF. The members of the tribe are very likeable and their motivations understandable.
One thing to consider though are the large models for the trollunits and heroes. Many maps in the campaign have tight spaces and the pathfinding AI seems to have problems to match those with the bigger hitboxes. This can make repositioning your troops/heroes in battle a challenge from time to time.
