Every Island, Every Level Gate
Slime Seas Worlds & Islands Guide
All 4 Slime Seas zones and 11 islands with exact level requirements and boss locations. Pulled from the official Trello.
Verified for Hub Island build
How many worlds does Slime Seas have?
Four zones — Slime Forest, The Dunes, Goblin Ruins, Shadow World — spanning 11 islands from level 0 to 360+.
Which island has the first boss?
Rima's Spire (Island 3, level 65) in Slime Forest. Demon Lord Rima guards it and drops the Iron Novice and Slime Lord armor sets.
Hardest island in the game
Sovereign's End (Island 11, level 360+) in Shadow World. Home of the Monarch Statue boss with 160k HP solo or 300k in a trio raid.
How to fast-travel
Activate waypoints via Adventurer Dave. The Forest Waypoint costs 1,000 gold + 2 Fur Tuffs + 5 Broken Horns and sits next to Rima's Spire.
All 4 Slime Seas Zones
Zone 1: Slime Forest
Islands 1–3- Lvl 0Island 1Starter Island
- Lvl 30Island 2Crimson Ruins
- Lvl 65Island 3Rima's SpireBoss: Demon Lord Rima
Zone 2: The Dunes
Islands 4–6- Lvl 90Island 4Desert Island
- Lvl 125Island 5Guild Headquarters
- Lvl 160Island 6Sinbad's KeepBoss: King Sinbad
Zone 3: Goblin Ruins
Islands 7–9- Lvl 190Island 7Goblin's Landing
- Lvl 220Island 8Shattered Hollow
- Lvl 255Island 9Ogre Lord's BastionBoss: Ogre Lord
Zone 4: Shadow World
Islands 10–11- Lvl 315Island 10Duskfall Isle
- Lvl 360Island 11Sovereign's EndBoss: Monarch Statue
Source: official Slime Seas Trello Worlds list. Last verified 2026-04-21.
Zone 1: Slime Forest (Levels 0-65)
The starter zone. Three islands: Starter Island (tutorial), Crimson Ruins (level 30 grind), and Rima's Spire (level 65, first boss fight). Forest Chests drop the Greatsword/Katana tier chain from Wooden to Lightsteel. You should not try to push to Zone 2 before beating Demon Lord Rima at least once — the Iron Novice and Slime Lord armor sets are real HP jumps.
Zone 2: The Dunes (Levels 90-160)
Desert zone. Desert Island (level 90) is the grind entry. Guild Headquarters (level 125) is where guild and PvP systems live. Sinbad's Keep (level 160) is the boss island — King Sinbad wields the Thornblade Greatsword and drops it to killers. His arena shape blocks the cheese strategy used on other bosses.
Zone 3: Goblin Ruins (Levels 190-255)
The crafting-input goldmine. Goblin's Landing (190) and Shattered Hollow (220) are the lead-in grinds. Ogre Lord's Bastion (255) is the premier farm island — Ogre Lord drops Ogre Horns at 41.58% plus rare weapons at 0.51% each.
Zone 4: Shadow World (Levels 315-360+)
The current end-game. Duskfall Isle (315) warms you up. Sovereign's End (360+) hosts the Monarch Statue with 160k HP solo or 300k in a trio raid. Shadow Steel and Igris armor sets come from here.
Slime Seas Worlds FAQ
How many zones are in Slime Seas?+
Four zones: Slime Forest (Islands 1-3), The Dunes (4-6), Goblin Ruins (7-9), and Shadow World (10-11). They gate behind level thresholds from 0 to 360+.
What level do I need for each Slime Seas zone?+
Zone 1 Slime Forest: 0-65. Zone 2 The Dunes: 90-160. Zone 3 Goblin Ruins: 190-255. Zone 4 Shadow World: 315-360+.
What's the order of Slime Seas bosses by zone?+
Demon Lord Rima in Slime Forest (Island 3), King Sinbad in The Dunes (Island 6), Ogre Lord in Goblin Ruins (Island 9), and Monarch Statue in Shadow World (Island 11).
How do waypoints work in Slime Seas?+
Talk to Adventurer Dave after level 15 and he teaches you the system. The first Forest Waypoint activation costs 1,000 gold plus 2 Fur Tuffs and 5 Broken Horns. Activating unlocks the teleport menu.
Does Slime Seas have PvP islands?+
PvP exists in the game (stats capped at 10,000 HP and 325 Melee damage), and Guild Headquarters on Island 5 serves a guild/PvP role. Exact PvP-only zones are not documented separately.