Half-Life 2: FlipSide Mod Client

Description
Flipside is a new and unique mod that truly allows you to see life as a mad man!

You play as a character that has just managed to escape from a mental institution. While your on the run your going through a fairy tale land, the birds are singing, the bright cartoony sun is shining and you bounce from cloud. The only way to true freedom is by reaching the ship at the end of the level. A cute bunny hops towards you and blocks your progress, bouncing you away, by pushing a single button the entire world catastrophically changes showing its darker side, the bunny is now an evil nurse who is trying to stop you from getting away! You head-butt her and continue your adventure using both worlds to your advantage

This is a mod which is refreshing graphical change, original idea and great music I highly encourage you to play it,

Read more on the official website here
http://flipside.thegame.googlepages.com