- Iron Docks: Silver
- Complete the Iron Docks Challenge Mode with a rating of Silver or better.
Iron Docks: Silver is an achievement earned from completing the Iron Docks Challenge Mode with a rating of Silver or better.
Patch changes[]
Patch 7.0.3 (2016-07-19): Moved to Legacy. 
Patch 6.0.2 (2014-10-14): Added.