Decaying Winter currently has no active redeem codes in the information gathered from the official sources, Discord, and the beginner and field guides. The game is not built around promo codes — there is no code-entry screen documented, and the collected material never lists a single working code to type in.
Why there are no codes
Unlike many Roblox titles, Decaying Winter does not hand out free items through coupon-style codes. Power and gear come from scavenging, the Scrapper, and crafting with blueprints and salvage at a workbench. If a code system is added later, it would appear on the official Discord and Trello first.
Where free power actually comes from
Salvage is the in-game currency of progress. Scrap unwanted items at the Scrapper, then spend it on blueprints to craft weapons and gear. Loot found on the ground, in crates, and in lockers also bridges the gap between waves without any code required.
Stay safe from fake-code sites
Because the game has no code redemption, any website or video promising "Decaying Winter codes" is almost certainly misleading. Do not share account details or download anything to chase codes that do not exist. Treat unverified claims as 待确认 until the official Discord confirms them.
What to check instead
For real, verified updates, watch the official Discord invite and the community Trello board. Those are the only places where genuine changes — including any future code system — would be announced.