Building a multiplayer FPS that runs in the browser, and you can play it now

Where our flagship special-operations shooter came from, what you can play free right now, and how we're building the rest of Raven Two's story on Semper Engine.

Operation Raven starts with one image: a helicopter running dark over a sleeping city, and a small team with a few hours to finish the job before anyone wakes up. Everything else in the game grew out of that picture.

You are Raven Two, the operator sent when the official record will later say nobody was ever there. The fantasy isn't about being unstoppable. It's about being prepared. Our tagline, Victory Belongs to the Prepared, describes how the game is meant to feel: you read a corner before you commit, you pick an approach, you control your weapon, and you earn each step forward.

Raven comes from our interest in the real craft of small-unit operations: how much planning goes into a few minutes of action, how a route choice made an hour earlier decides how a fight unfolds, and how night changes everything you can see and hear. We wanted to build a shooter around patience and decisions, set in an original world, with characters and a city we wrote ourselves.

The browser shaped the design just as much. We wanted a serious first-person experience that starts the moment you click, with no download and no launcher. That set the structure: a focused Instant Experience that respects your time, with a clear start, real pressure and a debrief at the end.

Operation Raven is live on semperplay.com as a free Instant Experience of about twelve minutes. You train in two environments, then deploy into Nightjar by ridge or by river. Opponents pursue, strafe and use the environment, and patrol pressure changes your approach. You aim down sights, control recoil and time your reloads, and checkpoints and a debrief keep the focus on your next decision.

We're also clear about what isn't there yet. The wider six-operation campaign, two-player co-op and competitive modes are planned and not yet available. Advanced squad tactics and additional weapon families are not in this version either.

Raven runs on Semper Engine, our shared engine built on three.js and WebGL. The game owns its own benchmark scenes, so we can launch a specific map with a fixed seed, frame, camera position and time of day, then capture exactly the same moment again after a change. That lets us check every visual and performance change against evidence instead of guesswork. The renderer scales across low, medium, high and ultra quality profiles, so the same operation runs on a modest laptop and on a strong desktop.

On the art side, Nightjar is built around readable streets, lit interiors and doorways. Night is the setting, but it should never be an excuse for not being able to see what matters.

Next, we're growing the operation beyond Nightjar toward the full campaign, one carefully verified piece at a time. We will only announce new content once it's real and playable.

Play Operation Raven free on semperplay.com, and create a free account to follow every update.