Mortar 0.3.0 · October 7, 2026

Lethal Company and Valheim

BepInEx games with mods from Thunderstore, one search across every source, and load order and performance tabs.

What changed in 0.3.0

New

  • Lethal Company and Valheim: Mortar finds them, installs BepInEx, and installs mods with all their dependencies. Valheim runs natively on Linux with no Proton needed
  • Thunderstore is a mod source for Lethal Company and Valheim, and CurseForge is a mod source for Stardew Valley
  • Browse searches every source at once, shows one card per mod, and lets you pick the source by its logo; an empty search lists each source's top mods
  • A details panel for every mod: description, versions, dependencies and changelog, with filters by category and sort
  • Load order and Performance tabs for Lethal Company and Valheim: the order plugins load, how long each takes at startup, and frame times and each plugin's cost while you play
  • While the game runs, each mod shows whether it actually loaded, and Mortar records the game version you played
  • Skip the intro is a per-game setting
  • Problems catches much more before you press Play: missing or incompatible plugins, dependency loops, two mods shipping the same plugin, deprecated packages with their replacement, and mods that change the same game code
  • Crash help names the likely cause of a crash, can find the mod behind it by testing halves of your list, and shares the log with one click
  • Import profiles from r2modman, Gale, Vortex and Mod Organizer 2, and share as an r2modman code or a Thunderstore modpack
  • Back up a whole profile to one file, including its saves and mods no site can download again, and restore it as a new profile
  • Pair two computers with a code to send profiles over your local network, or keep them in step through a sync folder
  • One Updates list across all sources, with Update all, a restore point and Undo all
  • A config editor for mods' settings files and their in-game settings menus
  • Steam Deck: play with the gamepad, larger touch targets, and start games in Game Mode
  • Mortar finds games installed in Bottles and launches them through it
  • The browser extension is on the Chrome Web Store for Chrome, Edge and other Chromium browsers
  • Settings has Accounts and Source health pages, a per-game source order, and a search that understands common words

Fixed (11)

  • The mod list, details panel, profile checks and startup are much faster
  • Downloads are checked against the site's hash, and a damaged one is dropped so Retry fetches it again
  • Saves are backed up before every update
  • Only real crashes are reported as crashes, and Stop asks the game to close before ending it
  • SMAPI no longer refuses to start after an earlier crash
  • Errors explain what went wrong instead of saying "Something went wrong"
  • Add to Steam updates its shortcut instead of adding a second one
  • A damaged mod archive fails that one install instead of closing Mortar
  • An update never replaces an unrelated mod that came from the same page
  • Undo covers config edits and keeps a mod's settings when you roll it back
  • Menus and tooltips are solid, lists no longer flash on first draw, and keyboard shortcuts no longer take over Enter, Space and the arrow keys

Downloads and checksums for 0.3.0 · Every release