Epic Games "vibe coded" its new Launcher, and it's shipping now

Nearly eight years after Epic took on Steam with its own Game Store and launcher, the Fortnite maker has deployed a new tool in its fight against Valve: vibe coding. Epic has released a publicly available "Preview" build of a new Epic Games Launcher that the company says it built by leaning on AI to write and review its code, and the announcement is anything but shy about it.

"Programming is hard. So, instead of doing that, we vibe coded a new Epic Games Launcher that's way faster and more responsive than the current one, and has a new look," Epic writes in its announcement post on the Epic Games Store site. The line reads as tongue-in-cheek, but the company insists the engineering story behind it is real.

What did Epic actually build?

The new app is a from-scratch rewrite of the Epic Games Launcher, the desktop client players use to install and launch games from the Epic Games Store. Epic Games Store General Manager and VP Martin Keely told PC Gamer that the team "started from scratch" and used AI as "a tool to write and review new features and new capabilities from the ground up in a different tech stack than what we had previously."

That detail matters. Epic didn't just ask a model to patch the old Launcher. The team deliberately moved to a different technology stack, then recreated the functionality players already had. Keely framed the goal as: "look at functionality that existed [in the current Epic Games Launcher] and [say] we want to replicate that, but not the code itself."

In other words, the product behavior stays familiar, while everything underneath it is new code — much of it produced and reviewed with AI assistance.

The takeaway: Epic replaced its launcher's codebase wholesale, using AI to do the writing and reviewing, rather than layering changes on top of legacy code.

Who is Martin Keely, and what did he say?

Keely is the General Manager and Vice President of the Epic Games Store, which makes him the executive voice behind this release. He has given two interviews explaining the project, one to PC Gamer and one to IGN, and his statements carry the substance of the story.

To PC Gamer, Keely described a ground-up rebuild: "started from scratch," with AI as "a tool to write and review new features and new capabilities from the ground up in a different tech stack than what we had previously."

To IGN, he put the benefit in terms of speed and team size. Using AI to code the new Launcher, Keely said, "made us more efficient and allowed a small team to rewrite the code base and be able to launch it faster across platforms, support Windows and Mac, and we're going to have a Linux version as well."

That's the concrete claim: a small team, a full codebase rewrite, and faster shipping across three platforms. The Linux version is on the way but not part of the initial Preview.

The takeaway: Epic's pitch is that AI coding let a small team do a rewrite that would conventionally demand a much larger one.

Why is Epic doing this now?

Context is everything here. Epic launched its Game Store and launcher as a direct challenge to Steam in December 2018, nearly eight years before this Preview build. That store's pitch was economic — better revenue splits for developers than Valve offered — but the launcher itself has long been the store's weakest flank, with players frequently complaining about performance compared to Steam's client.

The announcement directly addresses that history. Epic says the vibe-coded Launcher is "way faster and more responsive than the current one, and has a new look." Speed and responsiveness are, on Epic's own telling, the headline improvements.

There's also a competitive angle. PC Gamer's reporting on Keely's comments frames the new launcher's speed in explicit comparison to Steam, suggesting Epic sees performance as a lever against Valve's dominance on PC.

The takeaway: after eight years of competing on store terms, Epic is now competing on the quality of the client software itself.

What is "vibe coding," and why does the term matter?

"Vibe coding" is the colloquial term for building software by prompting AI models to generate code, accepting and iterating on the output with relatively light traditional hand-engineering, and letting the model do much of the writing and reviewing. Epic's own announcement leans on the phrase with a joke — "programming is hard. So, instead of doing that, we vibe coded" — but the company's executives back the approach with serious claims about efficiency.

The significance cuts both ways. On one hand, a major games company shipping a flagship storefront app built this way is a visible vote of confidence in AI-assisted development at commercial scale. If the Launcher holds up, it becomes a case study for rewriting large consumer software with AI in the loop.

On the other hand, the framing invites scrutiny. A launcher is security-sensitive, performance-sensitive software that millions of players run at startup. "Vibe coded" infrastructure will be tested by exactly the audience most inclined to compare it, unfavorably or otherwise, with Steam's client.

The takeaway: Epic has turned its launcher into the most prominent public test yet of whether AI-written consumer software can ship at scale.

What do we know, and what don't we know?

Based on Epic's announcement and Keely's interviews, the verified facts are:

• Epic has released a publicly available "Preview" build of a new Epic Games Launcher.
• Epic says the app is faster and more responsive than the current launcher, with a new look.
• The team "started from scratch" with AI writing and reviewing code, in a different tech stack than before.
• A small team rewrote the codebase and shipped faster across platforms as a result, per Keely.
• Windows and Mac are supported at Preview, with a Linux version planned.

What Epic has not detailed is which models or tools it used, how much of the code is AI-generated versus human-reviewed, and how the company is handling security and reliability assurance for a vibe-coded client. Those are the questions that will decide whether this reads as a milestone or a cautionary tale.

The takeaway: Epic has confirmed the what and the why; the how remains largely undisclosed.

What happens next?

The Preview build is live now for anyone who wants to test it, and the Linux version is confirmed to be coming. The real judgment will come from players: whether the vibe-coded Launcher actually delivers the speed Epic promises, and whether it survives contact with a user base that has spent eight years comparing Epic's client to Steam's.

Keely's claim that AI let "a small team" rewrite the codebase and launch faster across platforms is now on the record, and it's the kind of statement other software companies will either copy or have to answer for.