AlchemistNPC Lite

AlchemistNPC Lite on Your Terraria Server

AlchemistNPC Lite adds seven new town NPCs who sell potions, materials, and other goods, unlocked through progression steps like defeating the Eye of Cthulhu or Skeletron. It's particularly handy on multiplayer servers because it automatically detects whether Thorium, Calamity, Mod of Redemption, or Census are also installed and adjusts shop inventories accordingly. For that cross-mod detection to work reliably on your server, every involved mod needs to be enabled together in enabled.json and match versions across all connecting clients. German, Russian, Chinese, and Portuguese localizations are already built in.

Tip: If your server already runs Calamity or Thorium, enable AlchemistNPC Lite alongside them right away — the compatibility is built in from the start.

Plan the rollout and operation

AlchemistNPC Lite changes progression and acquisition because important goods become purchasable after boss milestones. Check unlocks, prices, and stock with the exact combination of Calamity, Thorium, or other mods in use. Test both a new and advanced character, then restart. Agree whether that convenience fits the intended difficulty before merchants permanently replace the previous material hunt.

Before enabling it, back up the world, characters, enabled.json, and mod configuration directory, and record the tModLoader, mod, and dependency versions. Start a world copy with the full list and connect at least two matching clients. Check the core feature, saving, restarting, reconnecting, and, for content mods, world generation or progression. Agree on server-wide settings and reload them after changes in ModConfigs. Update related libraries and content mods together, while adding independent packages one at a time. Before removal, store or discard mod-owned items, NPCs, tiles, and storage structures on a copy; missing content can otherwise damage a world or character. Move to a live maintenance window only after that copy loads without errors. Keep the previous package as a rollback until several sessions have completed successfully. Publish the active list for every player so clients and server do not start with different tModLoader profiles or stale dependencies.