NJClaw
OoOoOoOoOoh
Around 15 hours for a single playthrough seems a reasonable estimation (probably 20+ if you play slowly). But most of the content is entirely optional, with the main quest just being "complete one of the branches of side-quests", so you might end up just seeing a small percentage of it and finishing the adventure sooner, depending on your choices (quests are given to you by factions and openly aligning with one of them can ruin relations with others). Sometimes the improving and worsening of relations with factions flows reasonably, but other times the quest system is excessively clunky and simply talking with an NPC locks you in with a faction, without giving you a chance to say "no" to him, which really shows how this game is still unable to handle complex quests.How long is the Lost Valley campaign?
All things considered, it's a great expansion. Anyone who enjoyed the base game should try it.