Is Melty free, and is that a red flag?

Melty is entirely free and made by Stella Montis Inc., a Y Combinator-backed team. Free is the product strategy for building a mashup community, not a payment wall later — but as with any free app, download it only from the official site, melty.gg.

Does Melty modify my games permanently?

No. Mashups install alongside your games, and uninstalling a mashup restores your original files.

Are mashup uploads checked for malware?

Yes. Melty screens all uploads for dangerous files, and every mashup page has a report button. Screening reduces risk but does not eliminate it — see the precautions below.

Is it legal to play mashups?

Mashups modify games you legitimately own for personal play, which is the same legal territory as ordinary modding. Publishing is different: owning a game does not grant redistribution rights, which is why Melty audits releases and you are responsible for what your agent publishes.

Is Melty Safe? What to Know Before You Install

Melty patches the games installed on your PC, so asking whether it is safe is fair. The short answer: Melty itself is a legitimate, free product with malware screening and an audit process for published mashups — the real risks live in the edges, and they are manageable with a few habits.

What Melty does that reduces risk

Upload screening. Every uploaded mashup is screened for dangerous files before other players can run it.
Report button. Each mashup page includes reporting, so bad uploads can be flagged by the community.
Release audit. A published mashup does not go live instantly — Melty only releases it after seeing it run on the creator’s PC and passing an audit.
Reversible installs. Uninstalling a mashup restores your original game files, so a bad experience does not have to end in reinstalling your whole library.
Own-your-games rule. Mashups require legitimately installed copies, which keeps the platform anchored to ordinary modding territory.

The honest risks

AI-built mods are still mods. When an AI agent builds your mashup, you are the publisher. Review the files, the description, and sharing permissions before releasing anything — you are responsible for what your agent publishes.
Community mashups vary in quality. Screening catches dangerous files, not broken ones. A mashup that crashes is annoying; treat save data on heavily modded games as disposable.
Anti-cheat and online play. Modifying installed games can conflict with anti-cheat systems in the source games. Keep mashup play offline from the original games’ ranked or protected modes.
Impostor downloads. The only official source is melty.gg. Avoid re-upload sites and “free premium” mirrors.

Practical precautions

Download Melty only from the official melty.gg site.
Read a mashup’s page and report history before pressing Play.
Let your first mashup be a popular, well-played one rather than a day-old upload.
If an AI agent built your mashup, read what it changed before you publish.
Back up saves for games you care about before installing anything that touches them.

If a mashup misbehaves

Even screened uploads can be broken rather than dangerous. The response differs:

Crashes or visual glitches: uninstall that mashup — your original game files come back intact. Check the mashup page for a newer version before giving up.
Suspicious behavior (unknown processes, browser redirects): uninstall the mashup, report it from its page, and run a normal antivirus scan. Screening catches known-dangerous files; your report is what removes a new one for everyone else.
Anti-cheat warnings in the source games: keep mashup play away from the original games’ ranked or protected online modes; play mashups offline from those titles.

PC hygiene that makes Melty safer

Keep Windows and your GPU drivers current — most mashup crashes are driver-side.
Play popular, well-established mashups before day-old uploads; play counts are reputation.
On a shared PC, keep your AI coding agent sandboxed to its project folder so it cannot touch files outside the two games.
Read the mashup description and file list before pressing Play — quality shows in the write-up.

Bottom line

Melty’s model — screening, audits, reversible installs, and an owned-games requirement — is more consumer-protective than most modding scenes. Install it from the official site, be deliberate about which mashups you run, and it is a reasonable platform to build on. Start with the Melty overview, then try a mashup yourself with our creation guide.