A reported Steam promotion running during the weekend that began on September 18, 2026, includes six premium games. Four are temporary trials—Sea of Thieves: 2026 Edition, Diablo 4, Jump Space and Last Flag—while Crystal Crisis and Space Menace are offered as games players can reportedly keep after claiming them before their respective deadlines.
The distinction matters: playing a title for free during a promotion does not give you permanent access once the trial ends. A keepable offer does, provided the game is claimed within its promotion window.
The four games available as temporary trials
The temporary-access group includes four very different games:
| Game | Access type | What it offers |
| Sea of Thieves: 2026 Edition | Temporary trial | Pirate voyages, treasure hunting, open-world exploration and battles between crews |
| Diablo 4 | Temporary trial | Loot-focused action-RPG combat against monsters; the trial is limited to level 30 |
| Jump Space | Temporary trial | Early-access cooperative play for one to four players, ship combat, on-foot exploration and jetpacks |
| Last Flag | Temporary trial | Five-versus-five hero-shooter matches in which one team hides a flag and the other tries to capture it |
The reported trial window for all four games ends on September 21 at 1 p.m. local time. Diablo 4 adds a separate progression limit: reaching level 30 ends the trial even if time remains in the access window.
The two games players can reportedly keep
Crystal Crisis and Space Menace occupy the more valuable category for anyone building a library: they are reported as free to keep when claimed during their promotion windows.
Crystal Crisis is a competitive puzzle game built around block-stacking battles, with characters associated with The Binding of Isaac and Cave Story. The promotion’s reported claim deadline differs between accounts, so the article does not attach a single local cutoff to the offer.
Space Menace is a real-time strategy game focused on top-down space combat. Its reported claim deadline is September 23 at 10 a.m. local time.
What “free” means on Steam
Steam’s permanent Free to Play category is separate from limited-time promotions. A game listed as free to play can remain accessible without a weekend deadline, while a promotional trial expires when its access period ends. A game offered to keep must be claimed before its own deadline; simply launching it during a free weekend is not the same thing.
That leaves two practical choices in this six-game lineup: use the temporary window to sample Sea of Thieves: 2026 Edition, Diablo 4, Jump Space or Last Flag, or claim Crystal Crisis and Space Menace before their respective promotion deadlines.
