The Big Cogwheel is the fourth upgrade. It is one of the Workshop-Lategame-Upgrades (WLU).
| Level | Cost | Mass |
|---|---|---|
| 1/10 | 100B/50SpD | |
| 2/20 | 25T/250DV | |
| 3/30 | 100Qa/100SxV | |
| 4/40 | 50Qi/50TTg | |
| 5/50 | 2.5Sp/2.5Qg | |
| 6/60 | 100N/10SxQg | |
| 7/70 | 500DD/500TQig | |
| 8/80 | 25QaD/250Sxg | |
| 9/90 | 100QiD/100QaSxg | |
| 10/1a1 | 50SpD/50Spg |
Workshop
Engine & Engine Upgrade • Cogwheel & Big Cogwheel •
Hammer & Hammer Upgrade • Money Machine Upgrade & Interest Rate •
Balloon Pump & Balloon Pump Upgrade & Balloon Speed •
Portal & Portal Amplifier & Charger Upgrade •
Mine • Selling Detail
Clockwork City
House & Tavern & Building Upgrade • Planet & Planet Upgrade •
Tower • Windmill & Bellow & Bellow Upgrade • Propeller •
Tax Collector & Tax Collector Upgrade • Crystal & Crystal Upgrade