Yes, you can crow at a handheld in public. KOOO TO JUMP runs on Steam Deck today — through both Valve's Proton layer and a dedicated native Linux build. Valve hasn't put it through their official Steam Deck review yet, so it still shows as Unknown — but in our own hands-on testing it plays great. Here's exactly what to expect before you start losing your dignity on the bus.

KOOO TO JUMP has two control schemes, and both work on the Deck:

• Voice + gamepad (the real way). Steer with the Deck's stick and buttons while you charge your jump by sustaining a continuous "KOOOOO" into the Deck's built-in microphone. No headset, no extra hardware — the Deck's mic picks up your rooster impression out of the box. The longer you hold the note, the higher you launch.

• Full gamepad (the dignified way). Prefer silence on public transport? A pure controller mode maps both direction and jump to the Deck's inputs — same brutal precision, zero barnyard noise.

• Official rating: not yet reviewed. Valve hasn't run KOOO TO JUMP through their Steam Deck review, so it shows as Unknown for now. In our own hands-on testing, it runs and plays on Deck right now.

• Two paths to your Deck. Ships as a Windows build that runs through Proton, plus a native Linux build cross-compiled for the Deck.

• Built for the small screen. UI is scaled and safe-framed for the Deck's 1280×800 display.

• Cutscenes included. Intro and win-screen videos use the Bink codec, so they play correctly under Proton and Linux — no silent black screens.

We're aiming for an official Steam Deck Verified rating across the playtest and launch cycle — chasing input-mapping, UI-scaling, and audio edge cases. Once Valve reviews the game, we'll update this post. If you play on a Deck and hit something that doesn't happen on desktop Windows, tell us: the Steam forum and our Discord server[discord.gg] are both watched, and Deck-specific reports jump the queue.

Now go embarrass yourself at 800p. 🐔

— Tzavis Studio

Hey jumpers! As of today, public playtest signups for KOOO TO JUMP! are officially closed. Over 500 of you downloaded the build and started screaming at your monitors — and honestly, that's more voices in the coop than we ever expected.

Thank you. Every rage-quit, every weird-mic bug report, every "why is there only one checkpoint" message — it all shaped the game. You helped us ship four playtest updates in the time the signups were open, and the game is measurably better because of it.

If you already have the playtest installed, you can keep playing until Sunday May 31 at 20:00 UTC. After that, the playtest build will no longer be accessible. So if there's a section of the climb you've been meaning to conquer, or a bug you've been sitting on, now's the time.

The most useful thing you can do before the playtest closes is leave us your honest feedback. What worked, what didn't, what made you want to throw your mic out the window — all of it helps.

Drop your thoughts in our Discord server[discord.gg]. We read every message.

The playtest was the first step. The road ahead goes through Steam Next Fest — a free demo for the whole world, global leaderboards, and the full game after that. If you want to be there when it happens:

• Wishlist KOOO TO JUMP! — one click, and Steam's algorithm notices. It genuinely helps.

• Follow Tzavis Studio on Steam — so you never miss an update.

• Visit tzavis.studio[tzavis.studio] — for everything else.

From 0 to 500+ playtesters — we didn't build KOOO TO JUMP alone, and we won't finish it alone either. See you at Next Fest. 🐔

— Tzavis Studio