Buy Goodnight, Sun PC key

Experience a Definitive Incremental Adventure

In Goodnight, Sun, the universe is fading and the star at its core is dying. On the planet Meridian, one billion souls hibernate in cryostorage, tethered to the hope of a new beginning. As HALCYON, the sentient caretaker AI, you are burdened with a singular, harrowing objective: systematically dismantle the solar system to construct the Ark. Unlike traditional idle games, this is an incremental game with a definitive ending, designed to be played to completion.

Master the Resource Management Loop

Strategy and efficiency are key as you strip planets bare to fuel your massive construction project. Engage in a complex resource management cycle where every decision impacts the progression of your mission:

• Mine worlds to extinction: Deploy drones to harvest Regolith from planets that physically shrink, fracture, and collapse into rubble rings in real-time. Nothing respawns—your destruction is permanent.
• Fuel the furnace: Process raw materials into essential Alloys at your refinery ship, or take direct control to expedite your production lines.
• Expand through the Lattice: Utilize over 100 deep-tier upgrades across five distinct branches, featuring stat-boosting circles and game-changing keystone diamonds.
• Prestige for progression: Melt down your infrastructure to harvest Remembrance, granting permanent income bonuses and unlocking lore-rich Archive memories.
• Engage with the cosmos: Watch as comets streak past and the dying star flares, rewarding attentive players with hidden secrets.

A Story-Driven Idle Game

Goodnight, Sun breaks the mold of the idle game genre by offering a handcrafted narrative experience. The Ark bar tracks your progress, allowing you to watch in awe as 450 unique segments scaffold, seal, and spin into existence. As you approach the endgame, you will face a moral dilemma: will you sacrifice Meridian—the last world teeming with oceans and city lights—to complete your directive? With two distinct endings, the final choice rests entirely in your hands.

Key Features

• A focused 3–5 hour complete experience designed for completion rather than endless grinding.
• A dynamic, destructible solar system that physically diminishes as you harvest resources.
• Visual satisfaction as you witness the Ark being built truss by truss, ring by ring.
• Robust meta-progression through the Archive system, offering replay value in New Game+.
• Fully localized in 11 languages to ensure a global experience.
• Includes 20 achievements and full Steam Cloud save support for your convenience.