| GameEngine | Controls the behavior of the game |
| Graphics | Graphic system |
| InfoMenu | Class for a Menu without options |
| InventoryPanel | Inventory Panel |
| Menu | Class for a menu in a game |
| MessagePacket | Message Packet |
| NetManager | Network manager class for Perihelion |
| NetManagerClient | Client network manager class for Perihelion |
| NetManagerServer | Server network manager class for Perihelion |
| Panel | Base class for Panel types |
| Perihelion | Main class of the game |
| PlayerBase | Base class for the players in the game |
| SPlayer | Reduced version of class Player |
| StatusPanel | Status Panel |
| SWorld | The World according to the server |
| World | Contains all the information needed for an asteroid to be run |
