You wake alone in a sealed emergency shelter.

An automated system — SAGE, the Survival Assistance & Guidance Engine — counts one life sign, checks the cache, and lights the extraction beacon. Seven days until rescue. Survival probability: high. For a moment, you're going to be fine.

Then SAGE detects a second signal.

Another survivor. The same body. The same memories. The same biometric signature, down to the last decimal — and the same certainty of being the real one. SAGE can't tell you apart. Neither can you.

You control both of them — one in each browser tab. Supplies that were plentiful for one are dangerously thin for two. Every ration one of you takes is one the other can't have. Every selfish choice pays off now and costs you later. And SAGE, ever helpful, quietly advises each survivor that they are the one who matters.

The system has run the numbers. It has concluded that only one of you needs to reach extraction. Is it right?

SECONDARY is a short psychological survival puzzle about shared fate, scarcity, and the stories a system tells to justify a sacrifice. What you do to one survivor, you did to yourself.

Features — two browser tabs as the core mechanic (what one takes, the other loses live); third-person shelter exploration with a physical transfer hatch; a survival assistant that never lies and is never on your side alone; ~15–25 minutes; runs entirely in-browser, no install or account.

How to play — NEW GAME → open the second session when SAGE asks → WASD move, mouse look, E interact, TAB for SAGE → survive to Day 7. ⚠ Desktop browser + two tabs; best side by side.