Key features of Screeps include:
- Huge persistent world.
- Various units, base building, mining resources, territory control, economy, manufacturing, transporting, logistics and trading.
- Only basic programming skills are required. Pro developers can really stretch their muscles.
- Players edit scripts from the in-game editor, or using external IDE.
- Players can host their own server, modify games rules and play with friends via LAN or on the Internet. No subscription required.