Rocky is a C-tier uncommon slime in Slime RNG, locked to the Rocky Mountains biome. Drop odds: Uncommon roll. Combat role: Tank.
Slow, stoic, surprisingly tanky. Pair with a fast attacker to soak hits while your DPS slime cooks.
Roll in Rocky Mountains biome — Rocky's drop pool is biome-locked, no other zone spawns it
Drop rate is highest at the cliff-edge spawn points; mid-zone rolls are noticeably less efficient
Crafting Machine ingredient for the Huge Rocky upgrade path
Drops at boosted rates during stone / mountain themed events
Tank. With 35 damage and 0.7 speed, best slotted in mid-game biomes — graduate to a higher-tier slime when farming endgame.
Locked to the Rocky Mountains biome — unlock it first via the biome chain. Roll exclusively inside that biome to keep Rocky in the drop pool.
Duplicates fuel the Crafting Machine — see the Crafting page for recipes that use this tier. Always run the Trade Calculator before sealing a deal.
Trade value drifts with each patch — new slimes shift demand, codes shift supply. Cross-check against the live Tier List and the Trade Calculator before locking in any deal involving Rocky.
Rocky is the tank-class introduction slime — the unit that teaches new players what 'positioning matters' means in Slime RNG. It's slow (0.7 speed, the lowest of any C-tier), it hits like a damp sponge (35 damage), but it eats incoming damage like nothing else in the early game. Independent wikis catalog it primarily as the Crafting Machine input for the Huge Rocky path, which is its real long-term value. Mid-game players who skip Rocky entirely tend to regret it three rebirths later when they realize their AoE composition has a Huge Rocky-shaped hole in it.
The standard Rocky Mountains farming composition. Park in the cliff-edge spawn area, let Spike pick off runners while Rocky soaks the slow advancers. Run with Ultra Luck Boost active to maximize the Huge Rocky re-roll value of every Rocky pull.
Use this when you're seriously chasing Huge Rocky. Rocky-lead means every kill counts toward the Huge re-roll math, while Spike picks up anything that escapes the 0.7-speed swing radius.
Rocky trades in the 20M–50M Coin band — the lowest of any biome-locked Uncommon. The reason is supply structural: anyone who's unlocked Rocky Mountains can farm Rocky reliably, so demand never pushes value upward. The interesting wrinkle is that Rocky is the only slime whose trade value reliably increases right before a major patch — community speculation about new AoE content tends to drive Rocky stockpiling for the Huge upgrade path, even when the patch turns out to be unrelated.
Drop rate boosted at cliff-edge spawn points to ease the Huge Rocky chase.
Tank stat reworked — incoming damage reduction increased from 30% to 40%.
Launch — introduced as the C-tier Uncommon tank, biome-locked to Rocky Mountains.
Same biome or mutation pool — natural follow-up chases once you've locked in Rocky.
The questions players ask about Rocky most — answered with the live stats above.
Rocky drops at Uncommon roll from the Rocky Mountains biome. The fastest path: roll in rocky mountains biome — rocky's drop pool is biome-locked, no other zone spawns it. Stack Luck Boosts, Apples and an equipped Lucky Slime before opening rolls — see the step-by-step guide above.
Rocky's base drop rate is Uncommon roll before luck multipliers. Active Luck Boosts, Apples, equipped Lucky Slimes and rebirth multipliers all stack to lower the effective denominator — use the Luck Calculator to see your real odds for the current pull.
Rocky is currently rated "20M – 50M Coins" and fills the Tank role in combat. Keep at least one for collection bonuses; duplicates can be traded or fed into the Crafting Machine for guaranteed mid-rares.
Rocky drops from the Rocky Mountains biome — make sure you've unlocked it before opening rolls. See the Biomes page for the full unlock chain.
Rocky sits at C-tier with uncommon rarity, 35 damage and 0.7 speed. See the full Slime RNG Tier List for how it ranks against every other slime in its bracket.