Not going to repeat what was already said, just going to mention that there is in fact, fast travel in Underrail as you can pay for the metro system or boatmen to take you from city to city just like Morrowind and that the slow move speed is no longer an issue as you can increase game speed out of combat.
Expedition is a lot like Gothic 2: Night of the Raven in the sense that the new expansion content is integrated seamlessly into the base game with new content, dialogue, characters, and quests sprinkled into existing areas. You can begin using the new weapon types as soon as you start the game and some quests even have new solutions such as using a jet ski to infiltrate a base from the water. The new areas are beautiful and take extra advantage of skill and stat checks, for example, using a military disguise in a foreign base and using your persuasion skill to maintain your disguise as you pass by officers, or bypassing the guards entirely if your agility is high enough to hop over a fence. For how much content is added to the game, this expansion is a steal and I highly recommend it.
