Steampunk Assault

The Steampunk Assault is a Hardmode, Post-Lunatic Cultist, Invasion event where steampunk and clockwork-themed enemies start spawning at the world's original spawn point. A Steampunk Assault can occur if conditions are met or, when a player uses a Clockwork Gadget.

Once the Steampunk Assault has been completed for the first time and a suitable NPC house is available, the Clockworker NPC will move in.

Summoning
The Steampunk Assault can be manually summoned using a Clockwork Gadget.

If these conditions are met, a random Steampunk Assault can occur: If a Steampunk Assault does occur, a warning message will display; "You hear steam exhaust from the west" or "You hear steam exhaust from the east". Once a enemy from the Steampunk Assault reaches the world's initial spawn point, a message will display; "A Steampunk Assault is attacking!".
 * There is no other event in progress
 * The world must be in Hardmode
 * A Pirate Invasion must be defeated
 * Lunatic Cultist must have been defeated
 * One Pillar must be defeated

Enemies

 * Steampunk Swordsman
 * Steampunk Rifleman
 * Fabricated Beast
 * Clockwork Solider
 * Clockwork Gunner
 * Clockwork Parrot
 * Steampunk Airship
 * Steampunk Biplane
 * Clockwork Colossus