> SN2 Randomizer · Seed Map

Which scan now unlocks which blueprint, for your seed. Game data: …

Recipe seed

Creature seed

Softlock guard

Recipes & unlocks use a different seed than creatures — they're randomized separately in-game. The recipe seed is on the # seed: line of ue4ss/Mods/RecipeRandomizer/debug/unlock_map.txt (or in seed.flag); the creature seed is the one the creature pak was generated with. Fill in either or both.

Find a seed from constraints

Set what you want, then search — it brute-forces seeds on your machine (all CPU cores), so a single constraint is near-instant but each extra one multiplies the time. Recipe & unlock constraints find a recipe seed; creature constraints find a creature seed — two independent searches.

Recipe & unlock seed

unlocked by scanning

Creature seed

spawns as

Unlocks: scan the listed fragment to unlock that blueprint. Recipes: the ingredients each blueprint needs to craft, for your seed. Scan Tree: each card is one scan (like a Blueprint node) — the header is the fragment you scan, the rows below are the blueprint(s) it unlocks (a scan can unlock several, hence “unlocks N”). A row with a left (cyan) pin needs an item from another scan; a right (green) pin means its product feeds one. An arrow A —item→ B wires A’s output to the B blueprint that needs that item. Hover a row to trace just its links; hover the header for the whole chain; click a row to open its recipe. Scan Rewards: a separate shuffle from the blueprint tabs above — the game also pair-swaps what each scan grants (its databank / story-log entry, and the scanner label shown while you scan). Each card is a databank/story unlock; the SCAN row is the object you must scan to gain it for your seed (its scanner readout will show this entry's name in-game). Win-critical scans are held out so the run stays beatable. Spawn Map: for your seed, where every creature spawns — each point is the creature that spawns there in your run (the same shuffle the pak bakes), placed on the world map and coloured by depth. Hover a point for details (and what it replaced); click a point or a legend row to isolate one creature. Enter a creature seed to view it. Reproduced with the exact PRNG the game uses — validated bit-for-bit against a live dump (0 mismatches).
Item + creature icons © the Subnautica 2 Wiki contributors, used under CC BY-NC-SA 3.0. World map render: joric/subnautica2_tileset (public domain / Unlicense), composited by `web/tools/stitch-world-map.py`.