Goblin Cleanup One Slime Army Achievement: How to Clean a Level With 1 Slime

What the Goblin Cleanup One Slime Army Achievement Actually Requires

The requirement is short enough to fit in a single line: "Clean all blood of one level with only 1 Slime." That is the full description listed on the tracking page for the Goblin Cleanup one slime army achievement, and it contains three separate conditions you have to satisfy at the same time.

1. All blood — not most of it, not the obvious pools. The level needs to finish with no blood left behind.
2. Of one level — the condition is scoped to a single level, not a full run or a campaign. That means you are picking the right level, not surviving the whole game.
3. With only 1 Slime — the tightest constraint. One slime is your entire allowance for that level.

Because those three conditions interact, a careless attempt usually fails on the third one. You clear the blood, but you spent more than a single slime doing it, and the unlock never fires.

How Rare Is It? A Dated Snapshot

Rarity data for this unlock is limited, but one source does publish it. The table below records exactly what was displayed on the achievement's tracking page at the moment that page was captured, so treat it as a frozen snapshot rather than a live figure.

Two things matter about that data. First, the scope is the tracker's own registered player base, not every Steam owner of Goblin Cleanup, so the 1% figure cannot be read as a global Steam percentage — Steam's built-in achievement stats are a separate scope. Second, the snapshot is dated: check the live page before you quote a number, because tracked unlocks rise over time.

What the snapshot does tell you is directional and useful. A 1% completion rate on a tracker page means the Goblin Cleanup one slime army achievement sits in the small tail of unlocks that most players either skip or fail, which is a strong hint that a blind first attempt is unlikely to land.

A Testing Framework for the Goblin Cleanup One Slime Army Achievement

No verified player guide existed on the tracking page as of the snapshot, so nothing below should be read as confirmed game mechanics. What follows is a framework built directly from the wording of the requirement — a set of things to test in your own runs rather than a set of guaranteed steps.

Step 1: Do a dry run with no restrictions

Play the level normally once and simply watch where blood appears and how it spreads. You are not chasing the unlock on this pass; you are building a map. Attempting the Goblin Cleanup one slime army achievement before you know the blood layout means your single slime gets spent on the wrong end of the level.

Step 2: Choose the smallest blood map

The requirement says "one level," which implies you get to choose which one. Pick the level with the least blood and the shortest distance between blood patches. Fewer patches means fewer chances to burn your one slime early.

Step 3: Budget the slime before you move

Decide in advance which patches the slime handles and in what order. If the level's blood is clustered, work from the outside in so you never cross already-cleaned ground. If it is spread out, plan a single route that touches each patch once.

Step 4: Confirm what actually counts as "used"

Before you grind attempts, verify one thing: whether the counter measures slimes deployed or slimes consumed. Those are different failure states, and knowing which one applies changes how aggressively you can play. A quick low-stakes test run answers this faster than any forum thread.

Mistakes That Sink a One Slime Army Run

Community reports on this unlock are thin, and the tracking page had no submitted guide at the snapshot, so these are the failure points the requirement itself points toward:

• Cleaning the wrong level. Starting the attempt on a large, blood-heavy map wastes the run before skill matters.
• Treating it as a speed challenge. Speed is irrelevant here. The only budget that matters is slimes, so slow and exact beats fast and sloppy.
• Cleaning out of order. Crossing your own path usually means revisiting ground, and revisits are where a single-slime budget collapses.
• Assuming co-op helps. The description limits slimes, not players, and nothing in the supplied source confirms whether a partner's slimes count against you. Test it before you rely on it.
• Skipping the verification pass. If you never confirm what "one slime" means in practice, you can complete a clean level and still not understand why the Goblin Cleanup one slime army achievement did not unlock.

Where to Get Verified Help

The most reliable starting point is the official Goblin Cleanup page on Steam, which lists the game's achievements alongside the store details. From there, the Steam community hub and the achievement's own tracking page are where player-written walkthroughs appear first once someone posts one.

If you do find a guide, check its date. A route written for an earlier build may not match the blood layout you are playing, and achievement conditions occasionally get adjusted. The dated snapshot on the tracker page is a record of one moment, not a permanent statistic — re-check it whenever you want a fresh count.

FAQ

Does the Goblin Cleanup one slime army achievement require a specific level? The published description says "one level," which suggests any single level qualifies as long as every drop of blood in it is cleaned with a single slime. No source in the supplied material names a required level, so pick whichever map has the least blood.

How rare is One Slime Army? As of 2026-11-09, the TrueSteamAchievements page for the achievement displayed 16 tracked unlocks and a 1% completion rate among its tracked players. That percentage reflects the tracker's player base only, not all Steam owners.

Can I unlock it in co-op? That is unconfirmed. The requirement limits the number of slimes used, not the number of players, but no supplied source verifies how a partner's actions are counted. Test it in a low-stakes run before committing to a co-op attempt at the Goblin Cleanup one slime army achievement.

Is there a video guide? None was included in the reference material for this article, and no player-written guide was listed on the tracking page at the snapshot. Check the Steam community hub and the achievement page directly for anything posted since.