Lifting the first flood gate comes down to finding three fuses and installing them correctly in the fuse box. The note you find early on tells you exactly how it works, but the panel itself is fiddly enough that it helps to know what goes where ...
Fast travel in Mortal Shell 2 comes in two flavours. The first is available from the very start but involves a detour through Marrow Keep every single time. The second is far more convenient, but you'll need to earn it first.
Shells in Mortal Shell 2 don't come fully formed, you'll need to invest resources into them before their full kit of abilities opens up. Here's how the upgrade system works and what you'll need to make the most of it.
Mortal Shell 2 has no difficulty slider. Instead, it hands you items that reshape the challenge on your terms, one that makes the game easier, one that makes it brutally harder, and a New Game Plus mode that kicks in once you've seen everything.
Tarstones are equippable items that can dramatically change how you play Mortal Shell 2, from elemental weapon infusions to entirely new combat abilities. There are a lot of them, and knowing what each one does before you equip it saves a great deal ...
The Citadel of Penance gate is locked, the lever has been stolen, and the culprit has fled into a ravine. There are actually three different ways in, and one of them skips the lever entirely.
Lazlo's Shell is locked behind one of the game's more tucked-away boss encounters. Getting there requires finding the right beacon, navigating a courtyard full of enemies, and working your way through a long hallway to the fight at the end of it.
The Troubadour's Lute is one of the more useful sidearms for players who dread being swarmed by multiple enemies at once. It turns a chaotic fight into a much more manageable one, and doesn't require a boss fight or an elaborate questline to obtain.