Note: These guides are in English. The in-game wiki (minimap button) is available in Romanian and other languages with the same topics, plus live item and drop details.
Zeryon2 has 14 dungeons. Each needs a pass or key, has a time limit and cooldown, and is entered from Dungeon Lobby (or Dungeon Lobby Special for some). In a group, every member needs the entry item.

For exact chest loot, check the in-game wiki under Chests → Dungeon chests.

Orc Maze (Lv 35–60)

Entry: Orc Maze Pass · Time: 30 min · Cooldown: 40 min · Bonus: Strong vs Orcs

Stage 1: Kill orcs until you get an Orc Key, then use it on the seal at the end of the bridge.
Stage 2: Destroy all Shadow Metins, kill the Orc Chief for a Black Orc Key, and use it on the middle bridge gate.
Stage 3: Destroy Shadow Metins again to remove the Orc Spirit Chief's invincibility, then kill him.

Slime Cave / Melma (Lv 45–65)

Entry: Slime Stone · Time: 30 min · Cooldown: 40 min · Bonus: Strong vs Vampires

Stage 1: Destroy the Mud Metin, kill 103 monsters, then click the Flint.
Stage 2: Break 4 Mud Metins to get an Empty Flask, fill it on the mud, and place the filled flask on the Flint.
Stage 3: Kill 103 monsters, then kill the Slime Queen.

Spider Barones / Arachnid (Lv 60–80)

Entry: Spider Key · Time: 30 min · Cooldown: 40 min · Bonus: Strong vs Animals

Stage 1: Kill the Spider King — he drops the Spider Whistle. Click it to continue.
Stage 2: Destroy Spider Eggs, then kill the Spider Queen.

Devil's Tower (Lv 40–100)

Entry: No pass needed · Time: 50 min · Bonus: Strong vs Vampires

Floor 1: Kill all monsters.
Floor 2: Kill the Demon King.
Floor 3: Destroy the Devil Metin and the correct Disgrace Metin.
Floor 4: Farm 5 Key Stones from monsters and open the old seals to go up.
Floor 5: Kill the Proud Demon King, then talk to the Blacksmith to refine or go to the next floor.
Floor 6: Destroy Death Metins and the Crime Metin for an Unknown Old Chest — open it for the Zin-Sa-Gui Map and use it to continue.
Floor 7: Get the Zin-Bong-In Key from monsters and use it on the statue.
Top floor: Kill the Death Reaper.

Rune Dungeon (Lv 70–120)

Entry: Rune Pass (Zeus Stone can reset cooldown) · Time: 1 h 5 min · Cooldown: 2 h · Bonus: Strong vs Rune monsters · Entry map: Dungeon Lobby Special

Floor 1: Clear all monsters, then destroy Rune Metins in the correct order.
Floors 2–4: One of three random tasks — fight Haru (leader damages first until 70% HP), collect 10 Rune Souls for a Divine Key, or fight Buncho with metin phases at 60% and 20% HP (watch his doubled damage at 20%).
Final floor: Break all Rune Metins to damage Haru, kill Haru, farm Divine Keys, destroy the Rune Stone to damage Buncho and kill him, then finish Eien (he becomes untargetable at 50% and 10% until you clear monsters or metins).

Catacombs (Lv 75–95)

Entry: Mummified Head · Time: 40 min · Cooldown: 1 h · Bonus: Strong vs Vampires

Floor 1: Get a Crystallized Soul Key and use it on the Kud Statue.
Floor 2: Destroy the correct Reward Metin.
Floor 3: Kill the real Tartaros for a Twisted Totem and use it on the Basalt Obelisk.
Floor 4: Kill Charon.
Final floor: Kill Azrael.

Beran-Setaou / Dragon (Lv 80–100)

Entry: Twisted Key · Time: 30 min · Cooldown: 30 min · Bonus: Lightning power

Destroy all metins so Beran-Setaou can take damage, then kill him.

Meley (Lv 75–120, Guild only)

Entry: Guild dungeon · Time: 1 h · Cooldown: 3 h · Bonus: Fire power

Stage 1: Lower the Statues to 75% HP (they turn invincible at 25% steps).
Stage 2: Lower Statues to 50% — destroy Dragon Eggs when they appear or Statues stay invincible.
Stage 3: Bring Statues to 0% — kill 4 Dragon Guardians Idall, destroy eggs, use Dragon Fire Rings (drop from monsters) on Statues until all are green.
Final: Meley flees — claim reward from the Golden Dragon Chest NPC. Choose Queen Meley Chest or Dragon Guard Chest. Fail if guardians or eggs are not handled correctly before the last stage.

Razador (Lv 85–100)

Entry: Razador Pass · Time: 50 min · Cooldown: 1 h · Bonus: Fire power

Talk to Great Am-heh to unlock bridges — after each bridge, return to him for the next random task: find the correct Golden Saw Wheel or Maat Stones, kill Ignitor, clear all monsters, or destroy Hellfire Metin. Final step: kill Razador.

Nemere (Lv 85–100)

Entry: Nemere Pass · Time: 50 min · Cooldown: 1 h · Bonus: Ice power

Clear floors by killing monsters, finding the true Ice Key and Ice Flower Key, breaking Ice Cubes in order with the North Star (drops from mobs), destroying the Ice Metin, killing the real Szel, breaking the North Dragon Pillar, talking to the Ice Lion, then killing Nemere on the last floor.

Ochao (Lv 100–115)

Entry: Ochao Pass · Time: 30 min · Cooldown: 30 min · Bonus: Strong vs Devils

Stage 1: Kill 100 monsters.
Stage 2: Kill Lord Ochao in the map center.
Stage 3: Destroy 4 Liberation Metins in the middle room.
Stage 4: Kill Mighty Lord Ochao in the same room.

Jotun (Lv 100–115)

Entry: Dryad Stone · Time: 30 min · Cooldown: 30 min · Bonus: Strong vs Orcs · Entry map: Dungeon Lobby Special

Kill Bagjanamu, then kill Jotun Thrym.

Ship / Hydra (Lv 105–120, Group only)

Entry: White Sail · Time: 30 min · Cooldown: 30 min · Bonus: Ice power · Entry map: Dungeon Lobby Special

Stage 1: Party leader clicks the Helm — defend the ship for 2:30.
Stage 2: Kill Siren Queen and the first Hydra.
Stage 3: Defend the ship 1:30, kill the second Hydra, repair the mast with Repair Wood.
Stage 4: Defend 1:30, destroy Hydra Eggs to remove invincibility, kill the last Hydra, destroy the Hydra Treasure for your reward.

Pyramid / Anubis (Lv 105–120, Group only)

Entry: Ankh Cross · Time: 30 min · Cooldown: 1 h 30 min · Bonus: Earth power · Entry map: Dungeon Lobby Special

Floor 1: Destroy Wadjet Stone.
Floor 2: Collect 4 parchment pieces, click the Ancient Seal, kill Anubis's Servant.
Floor 3: Destroy Pharaoh Stone, kill Bastet.
Floor 4: Pass through 24 portals and kill the real Ra.
Floor 5: Use Sage Bands on the correct Anubis Effigies and Ankh Metin, then kill Anubis.
Floor 6: Clear monsters, use Ankh Keys on Wadjet Pillars, destroy Sphinx Stone, kill the Sphinx, destroy Sphinx Treasure for reward.

General tips

Bring the recommended strong against or element bonus for each dungeon
Watch the timer — most dungeons fail if time runs out
Dungeon rewards and chest contents are shown in the in-game wiki when you click the chest icon