Vistara:The Last Window

Seven days remain. Divide the last light, uncover a buried truth, and decide whether Lumen-9 survives underground—or reaches the open sky.

The artificial sun has seven days of power left.

In 2187, humanity survives beneath the surface inside Lumen-9, an underground city built around a failing source of artificial daylight. You are its newly appointed Daykeeper. Every morning, five districts ask for more light than the city can spare. Every night, the public waits for your explanation.

THE CITY RUNS ON YOUR DECISIONS

Allocate a limited supply of Light Units across Residential, Medical, Greenhouse, Industrial, and the Surface Gate. Protect one district and another may fall into darkness. Energy, public trust, food supply, city stability, and the hope of reaching the surface all respond to your choices.

INVESTIGATE WHAT WAS HIDDEN

Inspect detailed locations across Lumen-9. Recover damaged reports, altered energy logs, experimental seeds, air samples, and traces left by the missing Daykeeper. Evidence can expose lies, unlock new dialogue, and change what becomes possible later in the week.

BUILD TRUST—OR RULE WITHOUT IT

Work with Mara Quinn, the exhausted chief engineer; Sol Reyes, the principled medical officer; Nia Bell, the greenhouse director who still believes in the surface; and Cass Venn, the strategist determined to preserve order. Each remembers what you promised, concealed, protected, or sacrificed.

LIVE WITH THE CONSEQUENCES

Make public reports. Face a citywide vote. Permanently close a vital facility. Decide whether to repair the artificial sun, prepare the surface gate, preserve both possibilities, or let the residents determine their future.

Your full seven-day timeline leads to one of five complete endings. There is no perfect answer—only the city you shaped and the people who still trust you when the final window opens.

FEATURES

• A complete seven-day interactive science-fiction story • Meaningful branching choices and persistent consequences • Strategic light allocation across five city districts • Detailed investigations and an evidence archive • Four central relationships with unique dialogue and outcomes • Chapter replay that does not overwrite the main timeline • Five unlockable endings • Local save data and no account required • Portrait play on iPhone and iPad

Optional rewarded advertisements may be available at selected story moments. They are not required to complete the game.