game-editor.com

Here's where you list stuff you really like about GE.
- Simple interface
- No limits
- It lets people with programming knowledge take advantage of their knowledge, not doing every little thing for you

I have to add nice community

I second the third one! And I'll add:

*visual interface, I'm very visual so the interface almost makes it a new paradigm of programming. Each actor gets its own scripts and events and allows you to separate all your code by what it effects like a visual boundary. Helps me think clear without code that has nothing to do with what I'm working on clogging up my mind.

Best part is that youcould test your game right away and make a simple game fast. If 3d engines were this great to use I could make any game out there very easily.

my retrogamebox for iPhone is made using GE
http://itunes.apple.com/app/retrogamebox-lite-3-spiele/id463354676

GE is awesome, superfast, for me a rapid development tool, realtime game-testing with
no precompiling or loading. it´s simply amazing. the new version 1.5 will add physics, too!
also you can export to windows,linux, mac, ios and so on... simply stunning.