4J Studios will bring its open-world survival sandbox Reforj to PC via a closed, invite-only playtest starting in Q1 2027. The studio announced the date yesterday at Game Republic New Horizons in Yorkshire, during an on-stage interview with 4J's Chris van der Kuyl and Joseph "Stampy" Garrett at the conference's VIP reception.

4J shared additional details with GamesIndustry.biz after the reveal. The playtest starts invite-only, in the studio's words, "to ensure an optimised player experience" while the team keeps updating Reforj on player feedback. The host platform is still unconfirmed; the developer says it will announce that later this year.

That's a long runway. But it fits how 4J has run this project from day one.

What does the early access approach change?

Garrett argued Reforj's process differs sharply from the traditional early access route, and cited two reasons. Both are operational, not philosophical.

"The first one I think is just how early we got it in players' hands. We announced it when we had a prototype, so it was only nine months after development on the actual game began, and we literally had a world that could be generated, and it was creative mode building," said Garrett.

"There were no survival elements, there were no threats, there was a building. And that's when we announced it, and the very next day after announcing it, we had it in a select group of community members' hands and got them playing."

The second difference is the feedback loop. Weekly, unfiltered, straight to the top.

"Every single week we are going through all of the feedback, and we get a lot of it on the Discord, but once again it's not filtered through a community team. It goes directly to Patty Burns, the CEO and director, and Tom Fife, the lead designer," Garrett explained. "We're going through all of these feedback points, and often it ends up with changes going into the game the next week."

For a studio of 4J's track record — it ported Minecraft to consoles and handhelds, the so-called legacy console edition — that cadence is the product. Community requests become shipped changes inside a week, with no community-management layer in between.

Why Xbox first, and not PC?

Reforj is currently playable for early testers on Xbox Series X|S through the Insider Program. Garrett said the hardware consistency was deliberate: "Xbox really gives you the ability to bring in an audience super early and on a totally solid hardware spec, so you're not getting confused by bug reports coming in and compatibility [issues]."

There's also a messaging reason. "It allowed us to have a bit of a safe space because everyone out there is a citizen journalist. As soon as you put something out in the world on PC, it may get shared early on," he said. "We knew what was coming from our audience, our fans that love 4J and love what 4J did with what they call the legacy console edition. We wanted to make sure that when we really unleashed it on PC, the game was going to be ready for it."

In practice: Xbox Insider gave 4J a controlled-spec beta environment, keeping premature footage and compatibility noise off the broader PC market until the build could hold up.

Rixels and the Elements Engine

The studio also recently debuted a technology it calls Rixels, an alternative method of delivering textures that the studio says uses a fraction of the memory of conventional approaches. Rixels are integrated into 4J's proprietary Elements Engine.

Creative director Brian Gomez told GamesIndustry.biz the studio built the engine specifically to create its own sandbox games, after years of porting Minecraft to consoles and handhelds. Reforj targets PC, PS5 and Xbox Series X|S.

What does this change for players and 4J? A defined 2027 PC horizon, a still-unnamed distribution platform, and a studio that has turned weekly community iteration into its core development loop.

Watch for the platform announcement later this year — it will signal whether the Q1 2027 playtest runs through Steam or a more direct channel.