I spent some time playing Narbacular Drop today, It’s an independant game made by a group from Digipen. It features a unique Portal system similar to the upcoming game from Valve, Portal. Many of the people from Drop were hired by Valve and are now working on Portal for the source engine, which will be included with Episode 2 when it is released. The game is amazing, The Portal mechanic opens up so many gameplay possibilities, and it’s also just fun to mess around with (quality is bad I know):