ZERO Sievert 2 Co-op Explained
The Steam page describes solo Hunts and crews of up to four players. It says each Hunter keeps their own gear and loot, gains experience and can pursue personal quests during a shared Hunt.
How many players can join?
The store describes up to four players hunting together. That is a published game feature; the closed-alpha announcement confirms that players can try co-op with a friend, but it does not independently document every planned party configuration in the test build.
What carries over for each Hunter?
According to the official store description, every Hunter gains experience and retains their own gear and loot. Separate quests can be pursued during the same Hunt. These statements describe the game’s intended cooperative model; specific alpha behavior may change with patches.
Playing together in the closed alpha
Each participant needs legitimate playtest access. The developer says other Hunters may look for a squad in the official Discord if friends do not have keys. This wiki does not offer matchmaking or keys.
Quick answers
Is ZERO Sievert 2 single-player?+
Yes. Steam lists single-player as well as online co-op.
Does everyone need a playtest key?+
The official announcement describes redeeming a key for playtest access; it does not offer a shared guest pass.
ZERO Sievert 2: S01, S02 · 2026-11-12.
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