Game Source Entertainment has announced that Thanks, Light., a 3D portal-like puzzle-platformer developed by South Korean indie studio Lightersgames, is scheduled for official release on PlayStation 5 and Steam in September 2026. The free demo version is now available on Steam, offering a first look at the mechanic in action, with wishlisting now open ahead of this year’s launch.  Additionally, the game will participate in the upcoming Steam Next Fest starting June 15, alongside the release of a major content update and a brand-new trailer. The game’s central concept is a spatial manipulation of shadow and substance: players wield a flashlight to shift objects between 2D and 3D states. Start your adventure by solving puzzles with your imagination in the Liminal Space. 

Steam Next Fest

To celebrate their participation in the Steam Next Fest, the team at GSE is releasing a major content update for their playable demo, giving players an exclusive early look at the game’s unique blend of geometric and physics-based puzzles. Alongside the demo update, a brand-new 60-second trailer for Thanks, Light. is now available. This trailer will reveal more gameplay content and dive deeper into the story’s background lore. If you are excited to discover the world of Thanks, Light., this is an update you definitely don’t want to miss.

Thanks, Light. Demo Details

Here are the core highlights of this update:

Content Expansion: Brand-new playable stages are now available. In addition to Chapters 1 and 2, they are introducing Chapter 3 for the very first time, inviting players to challenge even deeper geometric and physics-based puzzles.

Gameplay Experience Optimization: Based on valuable player feedback, we have fixed known bugs to ensure a much smoother puzzle-solving experience.

Subtitles: A new subtitle toggle feature has been added, allowing players to turn subtitle effects on or off according to their personal preference.

Background Music: Brand-new in-game background music (BGM) has been implemented to create an even more immersive gaming atmosphere. The new content will be fully live during the Steam Next Fest.

Thanks, Light. marks the debut release from South Korean indie studio Lightersgames. Positioned squarely alongside first-person puzzle-platformers like Portal, Superliminal, Viewfinder, and The Talos Principle, the game introduces a deceptively simple mechanical premise: Under illumination, a silhouette transforms into a tangible 3D object. When the light is absorbed, 3D objects are folded seamlessly back into a flat, two-dimensional form. There are no lengthy tutorials here. Instead, you must rely on observation and reasoning, approaching problems from different angles and experimenting with various possibilities to discover. Immerse yourselves in the puzzle-solving experience and master your own game rules in the world of Thanks, Light.

The game has received honors twice at Korea’s indie game event, Indiecraft. It also earned a spot in the prestigious “Selected Indie 80” showcase at Tokyo Game Show 2025.

A free demo is now available on Steam, offering you a first glimpse into a world built for perfection. Here, light, shadow, dimension, and perception intertwine, hinting at deeper truths waiting to be uncovered. Also, take a look at the new trailer and tell us what you think on Bluesky and Twitter. Will you give Thanks, Light. a try?