| 💵 Cash System |
| 🏰👑👨 Caste System |
| 💥 Catastrophic System |
| 🏞️ Cave System |
| 🧀 Cheese System |
| ⚗️ Chemical System |
| 🚂🐊 Chessie System |
| 🧹 Clean System |
| 🧹🧼🧽 Cleaning System |
| 🌍🌡️ Climate System |
| ⏰ Clockwork System |
| ☁️ Cloud System |
| 🏖️ Coastal System |
| ☭ Communist System |
| 👍 Cool System |
| 🌡️ Cooling System |