Slime RNG is an incremental simulator where you roll for slimes, equip them to auto-battle enemy slimes, and spend coins to expand your upgrade tree. The order you buy upgrades decides how fast you progress. Pick the wrong nodes early and coin costs balloon before you can keep up, so the first handful of purchases matter far more than they look.
Priority upgrade order in Slime RNG
These five upgrades come before anything else. Each one either generates a resource you spend later or removes a bottleneck that slows the rest of your run.
| Order | Upgrade | Where to find it | What it does |
|---|---|---|---|
| 1 | Auto-Roll | Upgrade tree | Rolls for slimes automatically in the background. Rolls also act as a currency you spend on other upgrades, so this should be your very first unlock. |
| 2 | Teleporter | Player Skill Tree | Fast-travel between zones you have already unlocked, including the zones where crafting is available. |
| 3 | Goop Drops | Enemy Skill Tree | Lets enemies drop Goop, the currency used to Rebirth. Unlocking it early stockpiles Goop for later. |
| 4 | Slime Slots | Top left of the Skill Tree | Adds more slime slots so more slimes fight at once, clearing enemies and earning coins faster. |
| 5 | Diamond Rolls | Bottom left of the Skill Tree | A pity system with a higher counter than Golden Rolls that guarantees rarer slimes after a set roll count. |
How to earn coins faster after your core unlocks
Once the five priority upgrades are in place, coins become the main thing holding you back. The cost gap between early-game and mid-game nodes is steep, so building income early prevents a wall later.
Coin Income in the Loot Tree is the single best place to invest after your core unlocks. It increases the coins dropped when you defeat enemies, and the payoff is immediate. Stack it as high as you can afford.
More Enemies in the General Tree raises enemy spawn count, giving you more targets and more coins per cycle. Later upgrades unlock Big, Shiny, and Huge enemy variants that drop significantly more coins than standard ones.
Roll Speed sits in the bottom right of the upgrade tree. Faster rolls collect slimes quicker and also generate roll currency faster, so spending some rolls here pays back over time.
Luck raises the chance of rolling higher-tier slimes. Paired with Diamond Rolls, it makes rare pulls far more consistent because Luck lifts your baseline odds while Diamond Rolls guarantee a rare result after a set count.
Slime RNG upgrade tree reference
The upgrade system splits across three trees. Use this as a map of what every node changes.
| General Tree node | Effect |
|---|---|
| Luck | Raises the chance to roll a high-tier slime. |
| Roll Speed | Speeds up rolling. |
| Golden / Diamond / Void Rolls | Pity systems that guarantee a high-tier slime after a certain roll count. |
| More Clovers | More frequent Clover Rolls, which let you reroll. |
| Slime Slots | More slimes active on the field. |
| Goop | Currency used for Rebirth. |
| Goop Drip / Flood | Increases the chance of dropping Goop. |
| Enemies | More enemies spawn. |
| Big Slimes / Enemies | Chance to roll or spawn Big variants. |
| Huge Slimes / Enemies | Chance to roll or spawn Huge variants. |
| Slimy Slimes / Enemies | Chance to roll or spawn Slimy variants. |
| Inverted Slimes / Enemies | Chance to roll or spawn Inverted variants. |
| Target Range | Wider slime target range. |
| Loot Tree node | Effect |
|---|---|
| Coin Income | More coins drop when enemies are defeated. |
| Overkill | Overkilled enemies drop more coins. |
| Potions | Enemies can drop boosts for Luck, Roll Speed, Currency, and Ultra Luck. |
| Food | Enemies drop food you feed to slimes to level them up. |
| Player Tree node | Effect |
|---|---|
| Teleporter | Teleport between unlocked zones. |
| Walk Speed | Player moves faster. |
| Magnet | Automatically gathers loot. |
When Rebirth and crafting fit into the plan
Rebirth resets your zone progress but keeps your slimes, upgrades, and items while improving your Luck and Goop stats for the next run. Because later runs are stronger, it pays to push well into your current run before triggering a Rebirth rather than resetting early with little to show for it. Leveling slimes with Food beforehand carries over too, so early enemy clearing is faster next cycle.
Crafting becomes available at Heaven, the seventh zone. Once you collect recipe scrolls scattered across zones, you can craft slimes that may outperform anything you roll naturally. Unlocking the Teleporter early is what makes reaching crafting zones quick, which is the main reason it sits so high in the priority order.
How to confirm an upgrade is working
Each node shows its effect right away. Auto-Roll begins rolling on its own once unlocked, your roll counter climbs without input, and the Teleporter adds zone destinations you can select. Coin Income changes the coin numbers that pop off defeated enemies, and added Slime Slots show extra slimes on the field immediately. If an upgrade does not appear active, check that you bought the node in the correct tree, since Teleporter lives in the Player Skill Tree and Goop Drops in the Enemy Skill Tree rather than the General Tree.
Stick to the priority order, build Coin Income before chasing rarer variants, and the rest of the tree opens up far faster than buying nodes at random.