Clockwork Burrowers are Clockworks that can dive underground, bypassing walls and hiding for a short period. They are weak to the Deep Charge trap which sends a powerful shockwave underground. They are typically weak, but can catch unprepared archineer by surprise.
Silver Burrowers upgrade to Elite Burrowers on Day 86 at Dark Ridge. Elite Burrowers have increased attack power and health, and drop more Source.
The Sapper is a red boss version of the Clockwork Burrower. The Sapper was first introduced before the Clockwork Burrower at Deception Pass. In Deception Pass, The Sapper sets off explosions on the walls, forcing Lock to rebuild them. In Siege, the Sapper appears as a fake clockwork, which sets of a single explosion, damaging all Clockworks nearby.
| Soldier • Archer • Knight • Brute • Shielder • Magician • Healer • Flyer • Burrower • Phantom|
Silver Soldier • Silver Archer • Silver Knight • Silver Brute • Silver Shielder • Silver Burrower • Silver Healer • Silver Flyer • Silver Phantom