Gnomeregan

Getting in (Horde)

1. Rig Wars: Nogg, Orgrimmar. Keep it in your log.
2. Chief Engineer Scooty: Sovik, same shop as Nogg (needs Rig Wars in your log).
3. Go to Booty Bay (boat from Ratchet). Gnomer-gooooone!: Scooty on the docks gives you the Goblin Transponder.
4. Step on the transporter. It goes both ways, so keep the transponder.

Quests

• Rig Wars: kill Mekgineer Thermaplugg, loot Thermaplugg's Safe Combination and the Rig Blueprints.
• Grime-Encrusted Ring: drops inside; clean it at a Sparklematic machine, then Return of the Ring goes to Nogg.

Bosses

• Grubbis: talk to Blastmaster Emi Shortfuse to start a trogg event; Grubbis comes in the second wave.
• Viscous Fallout: clear the trash round it first.
• Electrocutioner 6000: Chain Bolt (spread), Megavolt frontal, Shock on the tank. Drops the Workshop Key.
• Crowd Pummeler 9-60: Arcing Smash frontal, Crowd Pummel and Trample around him. Casters stand far back.
• Dark Iron Ambassador (rare): interrupt Fireball; Fire Shield; kill the Burning Servants.
• Mekgineer Thermaplugg: Walking Bombs from dispensers. Kill them, or have someone hit the buttons to shut the dispensers.

Drops (both guides agree)

• Grubbis: Skullduggery Belt (leather), Grubbis Paws (mail), Irradiated Shield
• Viscous Fallout: Acidic Walkers (cloth), Toxic Revenger (dagger), Hydrocane (spell staff)
• Electrocutioner: Spidertank Oilrag (cloth), Electrocutioner Lagnut (spell ring), Electrocutioner Leg (sword)
• Pummeler: Gnomebot Operating Boots (leather), Thermaplugg Medal of Honor (AP neck), Manual Crowd Pummeler (2H mace)
• Ambassador: Emissary Cuffs (mail), Royal Diplomatic Scepter (healer mace), Glass Shooter (gun)
• Thermaplugg: Electromagnetic Gigaflux Reactivator (cloth helm), Charged Gear (ring), Thermaplugg's Central Core (shield), Thermaplugg's Left Arm (2H axe)

Legacy: counts toward Experienced Spelunker, the 26-45 dungeon point (beta client data).

Sources Blizzard Legacy · Client data · Icy Veins guide · Icy Veins quests · Wowhead