The game runs on an engine based off the Fallout 2 engine and is an MMORPG. At the moment, Online Beta Test 3 is open. The client consists of two FOnline games; FOnline: The Life After and FOnline: 2238.
Guy 2 - "What's FOnline?"
Guy 1 - "It's an MMORPG based on Fallout 2, and it's free!"
Guy 2 - "Awesome!"