SSTR is a single player escape-room style puzzle game set aboard Horizon. A colony ship adrift in the darkness of space, under the watchful eye of Sister. Awaken into madness and explore the horrors of Horizon’s past.
Common questions
Is it really free?
Yes. SSTR Demo is free right now on Steam, with nothing to pay.
Is this the full game?
No. A demo is a portion of SSTR Demo — usually the opening section — published so you can try it. It is free permanently, but it is not the complete game.
Where do I claim it?
On the official Steam page. We link straight there — we never host game files or act as a middleman.
More demos on Steam
4| Time left | Cover | Title | Type | Store | Was | Action |
|---|---|---|---|---|---|---|
| Ends 31 December 2026 at 23:59 UTC |
|
DAVE THE DIVER - Godzilla Content Pack | DLC | Steam | — | Claim DAVE THE DIVER - Godzilla Content Pack on Steam, opens a new tab |
| No deadline |
|
Explosive Odds - Supporter Pack | DLC | Steam | — | Claim Explosive Odds - Supporter Pack on Steam, opens a new tab |
| No deadline | Plague Lords: Witch Hunt | Free to play | Steam | — | Claim Plague Lords: Witch Hunt on Steam, opens a new tab | |
| No deadline | Before Your Eyes | Free to play | Steam | — | Claim Before Your Eyes on Steam, opens a new tab |