Now, we all seem to be waiting on HL3, but to think about a HL4 would be more interesting, as we'd have no clue what it would be about, and it's mystery makes it exciting somehow. I randomly came up with this plot here.
If you don't want to read this whole plot here, just skip to the bottom of the page and speculate on what HL4 might be like if Valve took it into consideration after HL3.
HL4 would be after all this mess going about in HL3, destroying the Borealis for example, destroying the Combine, etc. as far as Valve goes, they've probabely taken into account making a HL4 if HL3 goes well enough and doesn't end Half-Life altogether. HL3's gonna be mainly about the Borealis and learning further on about G-man, HL4 might be about the second generation after the Combine... (a second Generation!! So imagine if Gordon and Alyx, uh, had a kid....)
HL4 starts off a long time after HL3...
(1): Gordon's kid reaches about 17 or 18, the Combine haven't been entirely been killed but have not gotten their grip on the Earth again, their only scattered forces on Earth gathering up together an army to get at Gordon and/or his family (well, he escaped them, got them mad, killed them, etc. so why wouldn't they want him?) Gordon goes on a mission alone to gather up the Resistance team.
They head on to find this Combine army, and get captured, probably killed, after no return for two weeks, everyone at home start to get worried, then Gordon's kid, oh come on, I feel as if he/she needs a temporary name, I'd bet it to be a dude, so as a temporary name I'd go with Jordan (lol). Then Jordan and Alyx head off to find Gordon.
(2): After searching with Resistance members, they come across this place (why am I imagining this whole plot so far to be in some snowy environment?) in the rocks, or some secret Combine hideout, it is noticeable by showings of slight Combine tech around the entrance. They plan to ambush these Combine.
They do it, but only to realise that Gordon and some of the fellow Resistance members with him are gone, this place was only a temp. place to hold them. While at this base, they manage to pinpoint the next location of the Combine, and possibley where Gordon's being held. This whole journey all leads to a bigger place that DOES hold the Combine army gathered together. Now, Alyx is determined to believe that Gordon is still alive while most of the Res. members are starting to get convinced he's dead...
(3): As this jouney continues, Jordan get's a vision, or more like, he sees and meets G-man, G-man states to Jordan that if he wishes to see his father alive, he must complete a test for G-man, G-man has in mind that Jordan could posses the similar abilities to Gordon as well as special abilities, and he is therefore interested in him.
Alyx, Jordan, and their Resistance team find this Combine army. Jordan convinces everyone to stay behind, as they try to tell him it's too dangerous to go alone into the clutches of the Combine without a fight, eh, anyway, (so yeah, he goes and let's himself get captured) he doesn't just do this out of random, G-man told him this was part of his test, and he must go. The Combine almost thought to kill him, but they see he wants to be taken, Jordan get's in there, right in the middle of their army, and what he does from here on out is special. Jordan sends an EMP shockwave into the whole area and shatters the Combine eardrums!! lol (ok that was uncalled for) So turns out Jordan has a secret weapon he built in secret, and G-man wanted to see how it works, as well as see how well Jordan's ability is.
Ok. now, that. was. long. but we aren't done yet.
Part (4) of this big plot!: Gordon, as well as Alyx, are suprised to see that Jordan created a giant EMP shockwave into a small device, HA, (anything's possible in stories) Gordon, on the otherhand, is beaten up, now, if the team had been any longer, the Combine would've killed him then and there. The team head on back homewards, Jordan receives messages from G-man, telling him he did a great job... Then the whole Gordon working for G-man begins again, and if Gordon can see it, he'll stop the same things repeating themselves, and tells Jordan that whatever he does, not to listen to the man in the blue suit with a brief case.... The End.
And rumors of a HL4: episode 1 take place, for these are the times of Jordan Freeman!
Important bit: *phew* What a lot to get off my chest, thanks for reading if you read that enitre thing! Now, comment time! Also if you have anything better, some part needs something a little more in it, OR something more exciting! be so kind as to share it! It's comment time, what do you think of that plot? Also speculate about HL4 and what it might be like after HL3, we already know a lot about HL3, enough to make up it's story, but of course, Valve will be the ones to give us HL3's official story plot.