Valve founder Gabe Newell dropped a number of bombshells regarding Half-Life 2: Episode Two at EA's summer press event. Newell revealed that the vaunted PC first-person shooter franchise is going to arrive on the Xbox 360 and PlayStation 3 and that the PC and console versions will ship with not only a new single-player game called Portals, but also with Team Fortress 2, the ambitious multiplayer game that Valve tried to develop in the late '90s but that quietly disappeared later on.

Half-Life 2 fans are already aware of the episodic content that Valve is producing, in place of a Half-Life 3. Episode One, the first chapter, was released earlier this summer to great acclaim. Well, Episode Two won't just continue the story of Gordon Freeman, Alyx Vance, and the rest of humanity battling the alien Combine for control of Earth.

For one, Valve is planning to release Episode Two simultaneously on the PC, Xbox 360, and the PlayStation 3. And it wouldn't make sense to give the console players Episode 2, which is essentially the middle of the story, so the console versions of Episode Two will also include Half-Life 2, as well as Episode One. That's right, both Xbox 360 and PlayStation 3 players will be able to get their hands on the entire Half-Life 2 saga in one package.

In addition to that bombshell, Newell revealed that all versions of Episode Two will ship with a separate single-player game called Portals. This is something of an insanely inspired puzzle game that takes advantage of the Source engine, judging from the hilarious trailer that Newell showed. The trailer took the form of a training video for a new employee of an advanced corporation in the Half-Life 2 universe.

The video shows a diagram and explains that as an employee of this company, you may have to find the emergency exit to a certain room. However, there are often obstacles in your way, like a gaping chasm. No problem, because all you need to use is your Aperture Science Handheld Portal Device to create dimensional doorways that let you mess with reality. For example, if there's gaping chasm between you and your objective, just shoot a portal on the far side of the room, then shoot a portal open on your side, then enter the portal. You'll instantly transport from one side of the room to the next by walking through the portal (you'll even see yourself going through the portal).

That's the simplest example of how to use the portal gun. In other situations, you may be under fire by a gun droid. So all you need to do is shoot a portal open over the gun, then shoot a portal open beneath a crate, then watch the crate fall through the hole and crush the gun. It gets even crazier, and the diagrams shown in the trailer showed some incredibly crazy things that you can attempt, like creating a series of portals so that you're constantly chasing yourself. Some of the puzzles sound like they'll be "impossible," so the challenge will be to figure out how to use the portal gun.

This promises to be an incredibly puzzle-style first-person experience, which Newell says is part of the goal. "We wanted to take physics out of this domain as a tool that lets you bounce grenades around to how can we really change the game experience for our customers," he said.

Newell then dropped an even bigger bombshell by showing off Team Fortress 2. Those familiar with Valve's history know that Team Fortress 2 was an ambitious multiplayer action game that was supposed to come out after the original Half-Life. However, the game quietly disappeared after years of development, and it was assumed that Valve dropped the project.

Well, Team Fortress 2 is back and will be included with Episode Two, and it looks like nothing else on the market. Newell explained that Valve wanted to make this action game distinct, so the graphics (which use the Source engine) look like a Pixar-animated movie. To reinforce this, the various character classes in the game look like cartoon caricatures. These include the Medic with the huge needle or the Demoman with the sticks of explosives. Other classes include the Heavy, the Spy, the Scout, the Engineer, the Sniper, the Soldier, and the Pyro. Newell says that the goal with Team Fortress 2 is to create "the best-looking and best-playing class-based multiplayer game." Team Fortress 2 is certainly unique in appearance, so we'll see how it plays.

Valve will release more information about Episode Two and all this new content throughout the fall, and more announcements will be revealed as the year goes on. We'll obviously keep a close eye on it, so make sure to check back with us for more details.