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Part of: Idle Planet Miner beginner hub — Galaxy resets, mothership rooms, and mining logistics.

Idle Planet Miner Credit Spending & Mothership Rooms Guide

Player question: What should I spend my credits on in Idle Planet Miner, and why does everyone prioritize the Lounge room?

I like these games and play them myself. Complete guides are hard to find online, so while playing I collect community experience from Reddit, add a little of my own notes, and put this site together—hoping it helps. Thank you.

Quick answer

Recommendation In Idle Planet Miner, credit spending follows a strict order of return on investment: (1) Rush room unlocks until you unlock the Lounge. The Lounge applies a permanent percentage multiplier to credits earned on every subsequent galaxy sale, compounding all future progression. (2) Max the level-11 cap rooms: Workshop (craft speed), Forge (smelt speed), and Engineering (mining speed). Because their costs cap out at level 11, they offer quick, permanent boosts without becoming credit sinks. (3) Upgrade Robotics to shorten rover mission timers and unlock higher-grade searches that supply free Dark Matter and Resource Stars. Avoid investing heavily in modules until your core room roster is established.

Why the Lounge is your top priority

Observed Game Fact Credits are awarded upon selling a galaxy based on its total value. The Lounge is a dedicated Mothership Room that directly increases the credits earned from every galaxy sale.

Community Knowledge In r/IdlePlanetMiner thread 1wmf5rt[1], new players regularly ask whether to invest in existing rooms or push to unlock new ones. Community members emphasize that unlocking the Lounge is the single most impactful milestone for long-term momentum:

The level-11 cap rooms

Observed Game Fact Several Mothership Rooms have a hard cap at level 11. Unlike open-ended rooms whose costs increase exponentially forever, these rooms stop requiring credits once level 11 is achieved.

Robotics and rover mission scaling

Community Knowledge In thread 1wn79w3[4], veteran player u/StudyLegitimate2550 and u/M1sterM0g emphasize the value of the Robotics room:

Modules vs. rooms: when to shift focus

Recommendation In thread 1wmf5rt[1], player u/crowdedhoney advises: “Since you have a blue in each slot then you are good on modules for now. Modules take tons of resources”.

Early credits must not be wasted on marginal module rerolls or excessive energy cell hunting. A solid set of basic blue modules provides enough stat coverage while you funnel your credits into room unlocks and Lounge upgrades. Once your Lounge is above level 20 and level-11 rooms are maxed, you can comfortably divert focus toward advanced station modules.

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Sources & claim classes

  1. What should I spend my credits on? (将打开 Reddit) — Fuzzy-Disk8999, crowdedhoney, and strange143 on Lounge priority, early room unlocks, and module timing.
  2. LVL 60 LOUNGE 🎉🎉🎉 (将打开 Reddit) — StudyLegitimate2550 on credit multiplier scaling via Lounge.
  3. Mid to end game…… ¿random? (将打开 Reddit) — Striker_AC44 on level 11 room cost halving and crafting efficiency.
  4. New player. Need Mothership Room direction (将打开 Reddit) — StudyLegitimate2550 and M1sterM0g on Robotics room and rover mission tier unlocks.

Evidence via Evidence Job consumer pointer under research/pipeline/jobs/idle-planet-miner/. Classes used: Observed Game Fact, Community Knowledge, Recommendation, Version-sensitive.