You've managed to tame the most unruly of cogs. Your mastery of the steam engine is unmatched.
Congratulations, Taming The Unruly Cog, you're one step closer to becoming the ultimate Steam Master.
You've also unlocked the following subachievements:
Steam Punk Symphony - You've managed to tune 5 cogs to play a harmonious tune.
Advanced Turbine Design - You've optimized 10 turbines for maximum efficiency.