This Destructoid guide explains how to unlock and use the Tarforge, a crafting device at Marrow Keep in Mortal Shell 2 that lets players upgrade their weapons and builds. Progressing through the game requires locating specific materials scattered across different areas to activate each of the Tarforge's upgrade paths, which then unlock further enhancements for gear.

The Tarforge has four major upgrades plus one auxiliary upgrade: the Muradean Actuator (weapon enhancements, found in the tutorial area or via Village Outskirts), the Obsidian Lathe (sidearm enhancements, found in Martyr's Tomb near Widow's Overlook), Etching Needles (Tarstone tempering, found near Mushroom Village), the Foundry Stone (smelting, found near Outskirts of Mammon) and the Endless Core (allows weapons and sidearms to be upgraded to +20, obtained after defeating the dragon boss Zmei and cleansing the Hidden Knave beacon).