UnderRail Expedition

UnderRail Expedition is an add-on that expands the base campaign with new waterway maps connecting various harbors of the Underrail and a large region called the Black Sea, a massive underground body of water. You can leave the usual metro-crawling behind and travel there by boat. Among ancient ruins, you face vicious fauna, hostile natives, cunning pirates and a more sinister threat. The voyage also reveals more about the history of Underrail and the forces that shaped its world.

The Black Sea

The add-on introduces nearly 200 areas, including Black Sea shores and islands, underground facilities and pirate strongholds. You encounter new wild creatures and a couple of new robots. A new mid-game storyline lets you choose how to proceed; no decision or hostile action locks you out of completing it.

Boats and combat

You can travel the Black Sea and outmaneuver or destroy naval foes with 15 jet skis, from the “junk jet” to the “Devastator.” Purchasing more powerful vehicle parts lets you upgrade your ride. The add-on also adds shotguns, swords and spears, supporting new play styles, as well as new items found in the world or made through crafting.

New character options

Temporal Manipulation is a new psionic skill focused on delayed damage and utility. You gain specialization points at each level past 15 to improve your feats, and can level beyond 25 up to level 30, with a special pool of feats to choose from. The add-on also includes over 30 new regular feats.