GTA modder builds a multiverse letting players portal between GTA 3, Vice City, and San Andreas

A modder called DryxioGTA has built something Rockstar hasn't attempted since the original Grand Theft Auto in 1997 — a mod that connects GTA 3, Vice City, and San Andreas into a single playable multiverse, letting players step through portals and travel instantly between all three games.

The mod, still in development and without an official name, was shown off in a YouTube video. Three colour-coded portals sit in San Andreas' Grove Street, and walking through each one drops the player into the corresponding game, switching to the appropriate protagonist in the process. DryxioGTA explained in the comments that all three games run inside the same process sharing one Direct3D device, and that each portal is a live GPU texture — the other game is actually rendering behind it in real time, not playing back a video or a captured window. Each world keeps its own saves, missions, and settings, and continues simulating traffic and physics while you're away. The most jaw-dropping detail: you can shoot through the portals and hit pedestrians on the other side, which triggers a wanted level in your current world.

Grand Theft Auto has revisited Liberty City, Vice City, and San Andreas repeatedly across its history, with each new entry delivering a more detailed version of those locations — but never all three at once in a single session. The technical feat here is genuinely unusual; running three separate PS2-era GTA titles in one shared GPU context and synchronising their world states is well beyond a typical mod.

The GTA community's reaction in the comments was predictably enthusiastic. User li_B4shar_il called the cross-portal shooting "beyond unimaginably insane," while ross3695_basedhax landed the obvious punchline: "We got inter-GTA portals before GTA 6." That last line stings a little less now that GTA 6 has a confirmed November release window — but for fans who've been waiting years, a fan-made multiverse is a pretty good consolation prize in the meantime.