A teenager working under the handle "slqnt" has put together a version of Half-Life 2 that runs entirely inside a web browser, no installation or Steam purchase required. The developer, who runs the site slqnt.dev, says the port took roughly three months to build. Since surfacing online, the project has racked up attention fast, drawing both excitement from players eager to revisit Valve's 2004 shooter for free and pointed speculation about how long Valve will let it stay up.
How to play it
The port lives at hl2.slqnt.dev. There's nothing to download and no launcher to configure: visitors open the page, hit "New game," and are dropped into Half-Life 2 straight from the browser tab. That also sidesteps the usual cost of entry, since the original still sells on Steam for roughly $9.99. Building a functioning port of a full 3D shooter for the browser, rather than a small flash-style game, is not a trivial undertaking, which makes the reported three-month build time notable on its own.
What you actually need to run it
The only real requirement is a computer with a browser installed. The game does load on mobile browsers as well, but touch input isn't built out for a shooter like this one, so anyone hoping to play through it properly will still want a keyboard connected. In other words, it's less a mobile port and more a proof that the engine work runs on phones at all.
Going viral, with a catch
Clips and links to the project spread quickly across social media after it launched, and the reaction has been a mix of genuine enthusiasm and nervousness about its lifespan. Because the game runs from any browser with basically no setup, one recurring joke online is that it's perfectly positioned to end up running quietly on school computers, where a locked-down machine still usually has a browser available. Alongside that, there's an undercurrent of concern that Valve could move to shut the project down, given that it offers a way to play a paid Valve title without paying for it.
Updates are ongoing
slqnt hasn't treated the release as finished. Bug fixes and updates have continued to roll out since the port went live, suggesting active maintenance rather than a one-off tech demo left to rot after the initial burst of attention.
Part of a familiar pattern
Unauthorized ports of older games showing up in unexpected places isn't new. Doom in particular has been adapted to run on an enormous range of hardware and software over the years, and browser-based Half-Life 2 fits into that same long-running tradition of fans re-engineering beloved games to run somewhere they were never officially meant to. For now, hl2.slqnt.dev remains up and playable, built and maintained by a single high school developer rather than Valve. Whether it stays that way is an open question, but for the moment, one of the most influential shooters of the 2000s is a click away in a browser tab.
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