The Moonstone Equation: Steam price vs key
The Moonstone Equation has a regular Steam price of €9.99 and costs €10.41 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 The Moonstone Equation 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 The Moonstone Equation keys
1 offer, sorted by price
- €10.41Buy
The Moonstone Equation
CheapestSteam keyGlobal
The Moonstone Equation price history
- Steam€9.99
- BuyCheapKeys key€10.41
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 The Moonstone Equation key
- 1
Buy the key
Choose the The Moonstone Equation 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.
The Moonstone Equation FAQ
›How much is The Moonstone Equation on Steam?
The regular Steam price of The Moonstone Equation is €9.99. At BuyCheapKeys the Steam key costs €10.41.
›Where to buy The Moonstone Equation cheapest?
We track the BuyCheapKeys key price (€10.41) every day. Turn on the alert to know when it drops.
›Is the The Moonstone Equation key the same game as on Steam?
Yes. When you redeem the key, The Moonstone Equation 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 The Moonstone Equation at BuyCheapKeys?
The lowest recorded price for the key at BuyCheapKeys is €10.41 (October 4, 2026). Today it costs €10.41.
›Will the The Moonstone Equation 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 The Moonstone Equation 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 The Moonstone Equation worth it?
It has 75% positive reviews out of 24 on Steam (“Mostly Positive”), was released in 2018 and is developed by Andy Buck. Genres: Adventure, Indie, Pixel Graphics, Platformer.
Games like The Moonstone Equation, cheaper as a key
-52% vs Steam RRPOut There Somewhere
-74% vs SteamMO:Astray
-76% vs Steam RRPOwlboy
-2% vs SteamEnvironmental Station Alpha
Camera Obscura
-20% vs Steam RRPMago
The Moonstone Equation
€10.41