Is there a hidden or alternate ending for the game Limbo?

Question

I just finished Limbo for the first time and was disappointed by the ending. Is there an alternative or hidden ending?

Maybe if you get that achievement where you beat the game in one session while dying five times or less?

I also hit a key to exit the credits early, is there something after the credits?

Answer 1

The only thing you get after the credits is an achievement.

And no, there is no hidden ending in Limbo. If you beat the game without dying once you'll get another secret egg (and is required to get 111% in the game, but there's no achievement for that), but otherwise there's no secret ending.