When we set out to create Serious Sam II, we realized it would be really hard, impossible even, to connect our engine to any of the existing level editors available on the market. Since our engine uses so many advanced technologies that aren’t in other games and editors, we had to custom make a level editor. We even decided to abandon the original Serious Editor and build a new one from scratch to be able to implement all of the advanced features of the Serious Engine 2.
The Serious Editor 2 is much more than just a plain level editor. It’s more like a complete game development environment, designed to allow a designer to fully control all possible segments of the game. Various small editors are implemented into Serious Editor 2 that allow in-place editing of each game resource. These include a custom-made editor for meshes, animations, destructions and fonts, as well as numerous others, like the simulation editor that allows a user to exit from the player’s body and take complete control over running the game from the editor. In the middle of a fight the user can switch to edit mode and modify elements of an active game, like stopping flying rockets, moving enemies around, destroying things, adding new items, etc.
For the full first dev diary, head over to Gamespy.