8 Can’t-Miss Free Demos at Steam Next Fest — From Eye‑Tracked Goodnight Universe to a Horse‑First 13th‑Century Adventure

Steam Next Fest runs through Oct. 20 and offers hundreds of free demos for upcoming PC games. Below are eight notable demos you can try now, with links to each demo and short, factual descriptions of what they let you do.

1. Goodnight Universe
2. Sleep Awake
3. Ambrosia Sky
4. Lumines Arise
5. Reanimal
6. Godbreakers
7. Marvel Cosmic Invasion
8. The Legend of Khiimori

Goodnight Universe

Goodnight Universe is developed by the team behind Before Your Eyes and has a demo on Steam Next Fest. The game uses a web camera for eye-tracking controls, letting players interact with the world by looking. The full game is scheduled to launch on Nov. 11. You can try the demo on Steam here.

Sleep Awake

Sleep Awake is published by Blumhouse Games and presents a first-person horror premise about people disappearing in their sleep. The demo emphasizes surreal imagery and sound design contributions from Robin Finck. The Steam Next Fest demo is available at this Steam page.

Ambrosia Sky

Ambrosia Sky is developed by Soft Rains and features a player-controlled “interstellar cleaner” who removes alien fungus from derelict ships using a powerwasher. The demo showcases atmosphere, UI elements, and zero-gravity movement. Try the Steam Next Fest demo here.

Lumines Arise

Lumines Arise is a revival of the Lumines puzzle series by Enhance, the studio behind Tetris Effect. The demo presents the two-color block-matching gameplay and several music-driven levels. The full game is set to release on Nov. 11, and the demo can be found on Steam here.

Reanimal

Reanimal is developed by Tarsier Studios and offers a demo on Steam Next Fest. The game pairs minimalist puzzle design with a darker tone and follows two siblings through foggy, atmospheric environments. You can access the demo at this Steam page.

Godbreakers

Godbreakers is published by Thunderful Publishing and is a hack-and-slash roguelike with perk upgrades and enemy-absorption mechanics that grant special attacks. The game supports up to four-player co-op and is scheduled to release on Oct. 23. The Steam Next Fest demo is available here.

Marvel Cosmic Invasion

Marvel Cosmic Invasion is developed by Tribute Games and is an arcade-style 2D brawler inspired by classic Marvel beat-’em-ups. The demo on Steam allows players to try the game’s tag system and selectable characters. Access the Steam Next Fest demo here.

The Legend of Khiimori

The Legend of Khiimori is an open-world game set in 13th-century Mongolia where players act as a courier whose horse is central to gameplay. The demo provides 90 minutes of playtime and includes horse management systems such as feeding, stamina, injury treatment, and visible DNA stats in the menu. The game plans to launch in early access on Nov. 4, and the Steam Next Fest demo is available at this Steam page.