Valve, creators of best-selling game franchises (such as Left 4 Dead, Counter-Strike and Half-Life) and leading technologies (such as Steam and Source), today announced Portal 2 for shipment this coming holiday season.

Portal 2 is the sequel to 2007's Portal, which won 70 industry achievement awards.

Portal was pure genius but it needed a full game. Hopefully this will deliver.

- Portal was a 'trial'. Size and assets specifically kept minimal. Had no idea it would be this popular.
- Portal was a 'test bed', Portal 2 is a 'game'.
- GlaDOS returns as the antagonist.
- Chell returns, and we play as her.
- Portal 2 takes place a long time after the original. Hundreds of years, in fact. The complex has overgrown.
- Those orbs seen at the end of Portal are personality orbs. They've cornered off sections of the labs as their own, and are concerned about the decaying state of the complex.
- The opening sounds **** awesome. Im a bit **** I spoiled it for myself.
- Portal gun remains unchanged.
- Physics will now be part of portal puzzle solving. EG: A vent that sucks air in can be combined with a portal to 'suck' from a different location.
- "Paint" mechanic, various liquid substances that cause some reaction. For example, in the demo shown a orange substance on the floor caused Chell to be propelled upwards. Using portals you can apply these 'paints' to other areas of the level for puzzle solving.
- Reflection cubes will allow Chell to reflect lazers for various puzzles.
- The co-op campaign will have you playing as two bipedal robots. The like to hold hands.
- Splitscreen for people playing on the console, and 'picture in picture' available for those playing remote co-op (eg: PC). This allows you to easily communicate with the other player and combine efforts for puzzle solving.

All I can say about this is Valve why are you avoiding Episode 3? If another year goes by with no new information I am really going to lose it. Sure I love me so Portal but I want to know what happens to Gordon and company.