The game has been in development for about 3 years already and has a team of about 80 people working on it. The main focus has been the epic battles in the game from the beginning with other parts being added in as development continues. LE uses an engine developed by NCSoft which also contains some great interaction with the environment. Players can expect some serious damage when a battle occurs with some major interaction on the environment. All of this was built into the engine to improve the players' battle experience. In the Youtube game play video that was released, you can see a ton of monsters and heroes on the screen. NCSoft said that up to 500 monsters and characters were on the screen. NCSoft is doing a lot to optimize the gameplay for a lot of players at once.