''Film/{{Gladiator}}'' meets ''Series/TwinPeaks''. Or ''Film/{{Braveheart}}'' meets ''Series/TheXFiles'', depending on which side you play.

That's the best way to describe this WesternRPG from the creators of ''{{Avernum}}'' and ''{{Geneforge}}''.

In Britain during the time of the Roman occupation, a band of Roman soldiers and a band of Celtic warriors are both sent to the mysterious valley of Shadowvale, which seems to be on the very edge of the realm of faerie.

After carrying off a few typical adventure game quests, the main characters soon begin to get the wrong people angry.

!! Offers examples of:

* AncientRome
* BecauseDestinySaysSo
** Destiny is a committee of faeries, some of whom want you to fail and the other side to win. The compromise is your initially incompetent band.
* BlessedWithSuck
* BlackMagic
* Myth/CelticMythology: Plays a very big role.
* TheChosenOne: You.
* {{Curse}}
* TheEmpire: Rome.
* EvilLaugh
* TheFairFolk
* FlyingDutchman: Implied to be the fate of [[spoiler:the main party of Celtic warriors]] at the end.
* GladiatorGames: How goblins and Fomorians entertain themselves.
* HeroicSacrifice
* MacGuffin: Three of them.
* TheMagicGoesAway
* OurFairiesAreDifferent
* OurGoblinsAreDifferent: Unlike the goblins in Spiderweb's other games, the goblins in Nethergate are fairly intelligent and one of them can even join your party for a time.
* PsychicDreamsForEveryone
* ShellShockedVeteran: When your Roman party ambushes a few goblins resting by a campfire, they are surprised that the greenskins act like war-weary veterans instead of behaving like savage beasts they are supposed to be.
* TheRomanEmpire
* ToHellAndBack: While Annwn is not really a Hell, you are still going into the afterlife/other world in search of a MacGuffin.
* VideoGameRemake: ''Nethergate: Resurrection''.
* WickedWitch: The three crones.