Plot:
In the beginning, they find a very safe place to have a funeral for Eli. Once it was almost finished, they got attacked just like Black Mesa East. They retreat to a base where there is a portal to the entrance to the Aperture Science Enrichment Center. They raid it through the maintenance areas; having to go on a few test chambers. At GlaDOS's chamber, GlaDOS was taken over by the G-Man. The G-Man revealed to be the new dictator of Earth and commander of the Combine. In the midst of the battle, Adrian Shephard was released from statis from he fell form a hole and joined the fight. Once the battle ended, that is the end of Half Life 3. In Half Life 3: Episode 1, they will take over the Borealis. In Half Life 3: Episode 2, they will kill the G-Man in a new Citadel in City 34, ending the Combine, and Earth is once again as it is before the events of Half Life 1.
Playable Characters (Finally there will be singleplayer co-op, which makes the game harder then it is in single player)
1. Gordan
2. Alyx
3. Chell (you can meet her at the first test chamber, where she puts down a box of portal guns if in co-op, or just one if in SP)
4. Adrian (you can meet him during the GlaDOS battle.)
Available in: PC, Mac, Wii U, Xbox 1, PS4, Android, iOS, 3DS, Vita
In Mulitplayer, you can host a DM on default DM maps that will be made in 3 styles. Source New (as in HL3), Source (in HL2), and Source with GoldScr (Hl1).