Explaining THE Half-Life 3 ARG

On New Year's Eve, actor and musician Mike Shapiro posted a cryptic video in the voice of Half-Life's G-Man, teasing “unexpected surprises.” He captioned this tweet with the hashtags Half-Life and 2025, after a year of unprecedented leaks and rumors about something just called “HLX.”

The community immediately combed through every single aspect of his tweet, hoping to find a hidden clue about the ever-elusive Half-Life 3. They quickly came across some notable details, enough for many to theorize that Valve has started an ARG.

What is an ARG?

Before we review the evidence found so far, let's quickly review what an ARG is.

It stands for “Alternate Reality Game” and is basically an interactive mystery, often designed to promote something. Portal 2 was similarly teased through radio broadcasts and a hidden countdown to the game's announcement.

Whether or not Mike Shapiro's tweet is truly an ARG is unclear at this time. These could just be coincidences, so it's worth taking everything we talk about here with a grain of salt. With that said, let's look at the discoveries made so far.

197 appears three times

Mike Shapiro's narration was accompanied by dark images from his new song, Best Long Dog.

If you look at the window of the cover, you can see what appears to be the number '197'. This is significant because Best Long Dog is 3 minutes and 17 seconds long, i.e. 197 seconds, and it was released 197 days after his song Magnetic North.

Fans speculate that 197 is a reference to the isotope Au-197, or gold. This could be a nod to the GoldSrc engine.

This means that the number 197 appears as a potential three times. Reddit user Xenosaber20 pointed out that Valve has 196 posts on Twitter and speculates that the next post could potentially be the Half-Life 3 announcement (similar to the Alyx reveal), or another installment of the ARG. But in reality, that post would be a retweet of a Steam OS update.

Another theory is that 197 is a date, July 19. In support of this idea, if you place clock hands at 1, 9, and 7, you form a lambda symbol, and Au-197 is the only gold isotope with no half-life. Valve also renamed the iconic Popdog hall in the Counter-Strike 2 map de_train to “Longdog”, and there is even graffiti of a tall dog wearing a crown. But that's not the only clue fans think CS2 is hiding.

Every clock on De_Train is set to 2:23

Another of Shapiro's songs, Steeplechase, was released 223 days before Best Long Dog. Interestingly, Steeplechase is 223 seconds long, and top long dog is played in a 223hz key. That seems like a significant number, like 197, but what really ties it to the Half-Life 3 mystery is that every clock on de_train is set to 2:23.

Like 197, it is both a prime and a Chen prime, but its meaning is unclear.

A Chen prime is a prime number that, if you add two to it, gives you either another prime number or a number that can be created by adding two prime numbers together.

There is no compelling theory like the 196 Twitter posts from Valve yet. Could it be as simple as a date, i.e. February 23rd? We just have to wait and see, unless a more concrete proposal comes.

Portal Connections

Assuming the length of each song is important, there's one more to watch — Magnetic North. It is 234 seconds long, but it is the only appearance of the number that has been found so far.

This could be a reference to the Portal protagonist Chell as her subject number was assumed to be 234, given that it is the number of her bed in the Relaxation Vault. However, according to the HLX ARG investigation, the Lab Rat series revealed that she is actually Test Subject 1498.

However, some fans claim that the lyrics of Magnetic North may refer to Chell anyway. Shapiro speaks of a woman who “holds her tongue,” and unlike Gordon Freeman, Chell is canonically nonverbal. He also says in the song that “Her smile belongs to someone who's been there and back, and there again”, which may refer to her escaping Aperture Science only to return.

Portal will inevitably be important to the plot of Half-Life 3, as various canceled iterations of the game and even spin-offs featured the Borealis teased at the end of Episode Two, an interdimensional ship designed by Aperture Science.

de_train even has an out-of-bounds Portal easter egg with a graph comparing V-Corp products to “Aperture Labs”.

But whether or not these lyrics are actually a nod to Chell and Portal isn't clear, and they could easily just be a case of fans making connections to fit another song into the puzzle.

Lambda at Magnetic North

However, we are not done with this song yet. If you enter the magnetic north coordinates from 2020, when Alyx was launched, into Google Maps, you will see the satellite image above.

As fans point out, you can see what appears to be a lambda symbol, i.e. the Half-Life logo. But this is probably just a case of our pattern-hungry brains trying to connect unrelated dots, so I'm inclined to think this is a coincidence.

The whole point of an ARG is to offer a mystery that can be solved, and what exactly does this tell us? This feels more like seeing a face on Mars than anything else.

These are probably just coincidences

Mike Shapiro's tweet was definitely a tease too something. The hashtags, the voice of G-Man, and the vague nod to “unexpected surprises” even felt like a nod to Half-Life 3 announced in 2025. But it might not be as intricate as an ARG.

The Magnetic North connections feel like a stretch, and 223 could just be a weird coincidence. 197 was by far the most promising lead, especially with Valve only having 196 posts on Twitter, but that has now been revealed.

The Portal 2 ARG was much more obvious, with several updates to the original adding radio broadcasts and even cues to a message countdown, not to mention the involvement of other games like Killing Floor. The supposed evidence from Shapiro's music is much more cryptic and feels closer to the equally overcomplicated Grand Theft Auto 6 theories that were also dead ends. Valve may finally announce Half-Life 3 this year (Jason Schreier speculated as much), but Shapiro's tweet doesn't appear to be part of any larger mystery.