Mortal Shell 2 lets you tune difficulty with special seals and a night mode that literally turns off the sun

Cold Symmetry's Mortal Shell 2 skips traditional difficulty sliders in favour of special in-game items that let players push the challenge up or dial it down on their own terms. The studio showed off several of these mechanics in a video posted to Bluesky.

The Slayer Seal is the main accessibility tool — equip it and executing enemies with riposte attacks refills both your health and resolve, rewarding aggressive play in a way that echoes Doom 2016's glory kill system. The trade-off is that achievements are disabled while it's active. On the harder end, tracking down the Gloombound Flame candle and relighting a brazier at Marrow Keep summons an NPC called Thestus, who can switch the game into Night Mode — literally turning off the sun and introducing new events, NPCs, and dungeons alongside extra rewards. Two more seals round out the system: the Untarnished Seal adds a traditional parry option for melee, while Vatra's Seal lets you temporarily harden your shield into a full-body guard, though a harden meter keeps it from being a free pass — run it dry and you're left extra vulnerable.

Mortal Shell 2 is the follow-up to Cold Symmetry's 2020 debut, a Soulslike that carved out a niche with its shell-possession mechanic — inhabiting the bodies of fallen warriors to unlock different playstyles. The sequel keeps that core loop and expands it, with players controlling The Harbinger, a warrior hunting a stolen sacred egg across a world called the Undermether. The difficulty-item approach fits neatly into the broader industry conversation about accessibility in Soulslikes, where studios have increasingly looked for ways to soften the experience without flattening the design for everyone else.

No release date has been confirmed yet. The Bluesky reveal suggests Cold Symmetry is ramping up communication ahead of launch, and the layered difficulty system will likely be a talking point for players who bounced off the original or want a stiffer test than the base game provides.