UNDERDEEP is an idle dungeon crawl: you set your stats and a route, and the character plays that route while you are away. Pick the guide for the task you are on right now.
Start your first UNDERDEEP run
- Stats and attributes — what each of the ten attributes actually does.
- Build order — single target or AOE, and the order to spend points in.
- Jobs and stages — the eight first-stage jobs and what happens after stage 11.
- Skills and Orbs — what to buy, what to skip, when to take another slot.
- First dungeon route — the 72-tile path to the mimic and the damage targets.
Map the dungeons and set a route
- Cartography and coverage — how the map records itself and why coverage drives everything.
- Route markers — the A to G policy letters, the repeat key and two-policy tiles.
- Movement and the timer — the 3-2-1 countdown and the three ways to move fast.
- Vigor and Food — the two run budgets and how coverage raises them.
Fight things
- Monster health tables — health by dungeon and level, and the damage numbers that follow.
- Elemental weakness — the six elements and which monsters take extra damage.
- Potions in combat — why drinking mid-fight backfires and what to do instead.
- Stat thresholds — the per-dungeon numbers for block, dodge, doors and traps.
Farm loot and gear
- Drop rates — the corridor and static tables, the Luck Counter and the best tiles.
- Rarity tiers — N, R, SR and SSR, upgrade suffixes and the gear slots.
Run the idle economy
- Selling items — no sell button, duplicate drops become Coin, no player trading.
- Shop advances — what the Shop sells and why it is paid in friend points.
- Loop tickets — the daily ticket count, the reset time and the idle time it buys.
- Friends and friend points — in-game friend IDs and the login bonus that rides on them.
- Other players — the asynchronous encounters you meet inside the dungeon.
Choose in events
- Karma — what good and evil actually change, and what they do not.
- Negotiation and Charisma events — where INT, NEG and CHA are used, and why the rest is waste.
Fix problems and check your setup
- Offline mode — why there is no offline progress and what the startup check does.
- Permadeath — there is none, and what a death does cost you.
- Steam Deck — Linux requirements, the pointer-driven interface and the network need.
- Common problems — launch failures, save recovery, stuck doors and full loot slots.
How it compares
- vs Dungeons & Dragons — the tabletop vocabulary, and where the tabletop rules stop.
- vs Baldur's Gate 3 — the same fantasy with the campaign and the party removed.
