You are Gordon Freeman, formerly a scientist at Black Mesa Research Establishment, now reluctantly employed by a mysterious organisation as a troubleshooter. (They send you out looking for trouble, and when you find it, you shoot it.) You are contacted by the Man in Blue. He seems strangely worried; something has ruffled his normally impenetrable character. "Mr Freeman, we need your help urgently. It seems that somebody at Black Mesa has been experimenting with ... unconventional applications of the dimensional gateway technology. They have developed what appears to be a working time machine. "Unfortunately, the scientists who were working on it disappeared before we could ... persuade them to turn it over to us. It appears that we were not the only ones following their work from behind the scenes. A renegade organisation within the US Marine Corps got to them before we did, and used their technology to travel into the past.. Gordon Freeman against Naziz. Author: Ross Smith

RSS Reviews  (0 - 10 of 53)

Fantastic voyage.


Classic stuff! Be sure you've played it.


Pretty damn spectacular series of mods.

One of the best mod series I have ever played.

Lots of bugs

Very nice series. All of them quite lengthy and fun. I guess it's a classic and it's fun to play when bored, however I don't recommend playing it on hard mode because it becomes a pain in the *** with no fun especially on parts where enemies keeps respawning until you do a certain thing and sometimes it gets confusing on what to do and if you did right but maybe that's just me also the mod makes you visit many places in different times which is pretty fun especially the void jumping in the third one XD.

This series simply got better and better with every installment.

While it's unfortunate that not nearly enough games tackle the idea of time-travel as much as alternate history scenarios, it does make Timeline a lot more memorable for being so.

While the first installment was engaging and ambitious, it was rather clunky around the edges, this con was stamped out with the next couple of speedy released that grew longer and contained plenty of new ideas and locations with some nice inspiration and nods to great songs.

The gameplay is basic for a hL mod, but there is no need to fix something that isn't broken, and many fights can become quite frantic yet still fair.

My only complaint about the entire series is the large number of backtracking sequences, and there are times where fast-paced players will simply get lost.
For me, this is a small blemish on an otherwise great series with plenty of memorable sequences that are still fresh in my mind all these years.

No true HL fan should miss this timeless series :)


First one was average but the last one is incredible. Very interesting series with numerous fights, funny cutscenes, and you fight nazis and Hitler himself, so well... Good!

I found that at last! Occasionally i remembered the icy scenes of this mod and i wondered everytime what was that mod in my mind.

I can say this mod was really great even after many years later. I played on my old and faithful Celeron 400MHz PC circa 2003. Maybe time to play it again on a new one.

Community Rating



51 votes submitted.

You Say


Ratings closed.

Highest Rated (3 agree) 10/10

Fantastic voyage.

Apr 7 2013 by VladGuardian