Epic Games has released a preview of a rebuilt Epic Games Launcher for Windows, Mac and, for the first time, Linux. The notable part is how Epic describes the code: in its own announcement, per PC Gamer, the company calls the new client "vibe coded", the term for building software by prompting AI tools. A big, public-facing client from a major games company, written largely with AI, is rare enough to deserve a close look.
This post sorts out what Epic claims, what the press has verified, and what it means for anyone deciding how far to trust AI-written production software. It builds on our earlier coverage of Epic's AI-first order for its Disney shooter.
Quick reference: the Epic launcher preview
| Question | Answer |
|---|---|
| What is it? | A from-scratch rebuild of the Epic Games Store and launcher, released as a preview |
| Platforms | Windows, macOS and, new, Linux |
| Was AI used to write it? | Yes. Epic calls it vibe coded, and GM Martin Keely told PC Gamer AI wrote new code |
| Speed claim | Startup time halved; cold start to store page 46% faster than Steam (Epic's claim) |
| Independently tested? | Not yet, per PC Gamer |
| Linux distros | Ubuntu 22.04+, Fedora 43+, Debian 12+ (others may work, unsupported) |
| Fortnite on Linux | Planned, after Easy Anti-Cheat Linux v2 is accepted by distro maintainers |
| Replaces the old launcher? | Not yet; no date given |
What exactly did Epic announce?
According to PC Gamer, which was shown a demonstration before the announcement, the big Epic Games Store rebuild teased earlier this year has arrived as a preview download. The outlet reports the speed improvement "appeared significant" in the demo, and notes the redesigned library view is the standout interface change, including an option to bring in shortcuts to games installed through Steam and other clients.
GamingOnLinux adds the Linux details. Its author tested the preview with a Windows game: the launcher asks for a one-time download to support it, and the author found it uses GE-Proton, installed under the user's .local/share folder. Supported distributions are Ubuntu 22.04 LTS or newer, Fedora 43 or newer and Debian 12 or newer. Epic said other distributions may work but it will not test or support them.
What does "vibe coded" actually mean here?
The phrase is easy to over-read, so here is what is sourced. PC Gamer says Epic goes for laughs in the blog post, saying it used AI because "programming is hard", but the outlet's reporter asked Epic Games Store general manager Martin Keely, who took over from Steve Allison in August, whether AI was mainly used to analyze the old code or to write new code. Keely said the latter.
His fuller description, as quoted by PC Gamer: "We started from scratch. This is a completely new architecture for both the store and the launcher shell. So we did look at functionality that existed and said we want to replicate that, but not the code itself. So [AI] was 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."
Three things follow, and one thing does not:
- A rewrite, not a patch. Keely says the store and launcher shell are a completely new architecture in a different tech stack. The speed claims may owe more to dropping the old architecture than to AI itself.
- Humans still specified behavior. Epic looked at existing functionality and chose what to replicate.
- AI also reviewed. Keely describes it as a tool to write and review.
- We do not know the share of AI-written lines, how much was hand-edited, or what testing it passed. Epic has not published that.
That last gap matters because "vibe coded" in common usage means accepting AI output with little inspection. Epic's description is closer to AI-assisted engineering with a human-owned design. For the distinction, see our guide to taste versus judgment when choosing AI drafts and the review-bottleneck data in Harvard and Jellyfish on AI coding agents.
A modular prototype resting on a drafting triangle representing an AI-written application rebuilt from scratch
Is it really faster than Steam? Claimed versus verified
Epic's numbers, as relayed by PC Gamer: startup time halved, and a cold start to the store page 46 percent faster than Steam. Epic also says an external vendor verified the technical improvements. We could not find the underlying test report, so absolute timings and test conditions are unknown.
| Claim | Source | Status |
|---|---|---|
| Startup time halved versus the old launcher | Epic, via PC Gamer | Claimed; demo looked fast to PC Gamer |
| Store page 46% faster than Steam from cold start | Epic | Claimed; vendor verification asserted, report not published |
| Linux client runs Windows games | GamingOnLinux hands-on | Confirmed in a quick test of one game |
PC Gamer states plainly: "We have yet to test the client ourselves." Until people measure on their own machines, with their own libraries and SSDs, treat the Steam comparison as marketing. A launcher starting faster than Steam is also a narrow win: it says nothing about download speed, store features, or reliability, where Steam has years of lead.
What is the Linux news, and why is it a bigger deal than the AI label?
For many readers the headline may be Linux. Epic is also rebuilding Easy Anti-Cheat for Linux. In its tech blog, as quoted by GamingOnLinux, Epic says it will bring protection "much closer to par with Windows" using signed kernel, signed kernel modules and secure boot with attestation, and will pilot EAC Linux v2 in Fortnite first, then offer it to other developers.
Epic says the Steam Deck does not currently support the features EAC v2 requires, and that it is talking with Valve. It also plans a panel with the Fedora Project Leader later this year. None of this has a date. Fortnite on Linux is a promise conditional on distribution maintainers adopting the security requirements, so it should be read as direction, not a release.
How did we get here? A short timeline
The launcher has long been a complaint. The Epic Games Store client has drawn criticism for slow startup and a heavy interface compared with rivals, and Epic has said for months that a rebuild was coming. In August, Steve Allison left as store general manager and Martin Keely took over, per PC Gamer.
On Monday, October 12, Bloomberg reported the "AI first" order for the Disney-licensed shooter, which we covered in the earlier Epic post. Two days later, the launcher preview shipped with the vibe-coded label attached. Read in order, the sequence looks less like a one-off experiment than a company-wide stance: use AI on the storefront, on game production, and in the tooling around Unreal.
What are the open questions?
Several things are unknown, and they decide whether this is a model to copy or a risky showcase:
- Quality gates. Epic has not said what testing, security review or code audit the AI-written client passed, or how much was reviewed by humans line by line.
- Security surface. A launcher installs software, stores sessions and handles purchases. AI-written code in that path deserves the same audit as any other, and independent researchers will likely pick it apart. Our coverage of agent-related security incidents shows how fast flaws in AI-built tooling get found.
- Feature parity. The preview is light on features. Library management, parental controls, regional pricing, gifting and the mobile store all need to match before the old client is retired.
- Independent speed tests. Until reviewers measure startup, memory use and store loading on ordinary hardware, the Steam comparison stays a vendor claim.
- Anti-cheat timing. Fortnite on Linux depends on distribution maintainers adopting secure boot and signed kernel requirements, which many desktop users do not run today.
Why does this matter for AI builders?
Epic is a bellwether for how big software companies talk about AI. The rebuild comes days after Bloomberg reported that Epic told the team on an unannounced Star Wars and Marvel shooter to take an "AI first" approach. PC Gamer quotes CEO Tim Sweeney: "We have a huge pivot underway here at Epic, moving developers around to retool for maximum AI acceleration," adding that the aim is to build more and better, not to do the same with fewer people.
Calling a shipped product "vibe coded" is a deliberate stance. PC Gamer reads it as Epic signaling it is unbothered by AI critics. Others will see risk: a launcher handles accounts, payments and installs. Compare how System76's COSMIC desktop banned AI-generated code, and how NetBSD and other projects wrote AI-free commit policies. The same week, Linus Torvalds described where AI helps and hurts kernel review. The industry is splitting between teams that ban AI code and teams that advertise it.
What should you do?
- If you are a player, try the preview alongside the existing launcher, not instead of it. Epic says it is light on features and that a full switchover has no date.
- If you are on Linux, check your distribution against the supported list before filing bugs.
- If you ship software, note the pattern: rewrite against the old behavior, use AI to write and review, and publish measured results. Do not copy the "vibe coded" label without the testing story behind it.
- If you care about security, watch what Epic publishes on EAC Linux v2 and the testing of the launcher's AI-written code, since neither is documented yet.
Details reflect Epic's announcement as reported by PC Gamer and GamingOnLinux on October 14, 2026, and may change as independent tests land.
Related reading
- Epic delays its Disney shooter and orders an "AI first" build
- Karpathy on discardable software and abundant code
- Harvard and Jellyfish: AI coding agents produce more code, not more software
- System76 COSMIC bans AI-generated code
- NetBSD and AI-free OS commit guidelines
- Linus Torvalds on vibe coding and kernel review
- Xbox Labs on AI game decompiling and ports