Project Castaway: Steam price vs key
Project Castaway has a regular Steam price of €16.89 and costs €25.36 as a key at BuyCheapKeys (October 4, 2026). Turn on the price alert and we'll tell you when it drops.
- Instant deliveryKey by email and in your account
- Full guaranteeReplacement or refund
- Secure paymentCard, PayPal, Google Pay, Apple Pay
- Activates on SteamSame game in your library
- Up to 4% cashbackWith the VIP Club
Should I buy Project Castaway now? Wait for a drop
Turn on the price alert and we'll let you know as soon as the key gets cheaper.
Price score: 0/10 · The key does not beat the regular Steam price.
The same game, for less
A Steam key gives you exactly the same as buying on Steam. Only the price changes.
Available Project Castaway keys
1 offer, sorted by price
- €25.36Buy
Project Castaway (Steam Gift)
CheapestSteam GiftGlobal
Project Castaway price history
- Steam€16.89
- BuyCheapKeys key€25.36
We've been tracking this game since October 3, 2026. The chart will appear once there are a few days of data.
How to activate the Project Castaway key
- 1
Buy the key
Choose the Project Castaway offer and pay. You get the key instantly.
- 2
Open Steam
Go to “Games” › “Activate a Product on Steam”.
- 3
Redeem and play
Paste the key and the game stays in your library forever.
Project Castaway FAQ
›How much is Project Castaway on Steam?
The regular Steam price of Project Castaway is €16.89. At BuyCheapKeys the Steam key costs €25.36.
›Where to buy Project Castaway cheapest?
We track the BuyCheapKeys key price (€25.36) every day. Turn on the alert to know when it drops.
›Is the Project Castaway key the same game as on Steam?
Yes. When you redeem the key, Project Castaway is added to your Steam account with achievements, cloud saves and updates, just as if you bought it on Steam.
›What is the lowest price for Project Castaway at BuyCheapKeys?
The lowest recorded price for the key at BuyCheapKeys is €25.36 (October 4, 2026). Today it costs €25.36.
›Will the Project Castaway key work in my country?
We list Global and Europe region keys. Each BuyCheapKeys product page tells you whether it can be activated in your country before you buy.
›Is it safe to buy from BuyCheapKeys?
Yes. Delivery is instant by email and in your account, we accept card, PayPal, Google Pay and Apple Pay, and every purchase is covered by a replacement or refund guarantee.
›Does Project Castaway work on Steam Deck?
Valve rates it “Unsupported” on Steam Deck. Once the key is activated on Steam you can play it on Steam Deck just like on PC.
›Is Project Castaway worth it?
It has 64% positive reviews out of 1,822 on Steam (“Mixed”), was released in 2026 and is developed by Mardonpol Inc.. Genres: Open World Survival Craft, Co-op, Online Co-Op, Exploration.
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Project Castaway
€25.36