Invention 3 — cheap CD keys, compare prices
Is it worth buying?
- Reviews are mixed. (Steam 72%)
- The price is at or near its all-time low — a good time to buy.
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
Invention 3 is an action-adventure game where the player battles through waves of zombies while trying to reach somewhere secure. It was developed by Falco Software and published by Conglomerate 5 in 2022.
Best price today
€0.72
all-time low: official €0.72 · keyshop €0.93 near low
The cheapest Invention 3 key right now costs €0.72 at Steam — the best of 4 compared offers. The lowest price we have recorded for this game: €0.72.
The average low over the past 4 months was €0.77.
Prices as of
Steam best price Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
Invention 3 prices by store 4
| Store | Type | Price |
|---|---|---|
| Steam | Official store | €0.72 |
| Kinguin | Marketplace | €0.99 |
| G2A | Marketplace | €1.61 |
| K4G | Marketplace | €7.53 |
Lowest — official stores
€0.72
Jul 2026
Lowest — keyshops
€0.93
Aug 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €0.72 | €0.93 |
| Sept 2026 | €0.72 | €0.93 |
| Aug 2026 | €5.19 | €0.93 |
| Jul 2026 | €0.72 | €0.98 |
Lowest in-stock price per month from our price history; the current month is the low so far.
How to activate your key
- Steam key — open the Steam client → Games → Activate a Product on Steam → enter the key. Stores with this activation: Steam, Kinguin, G2A, K4G
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All-time low so far: €0.72
System requirements
| Minimum | |
|---|---|
| OS | Windows 7 |
| Processor | Intel Core 2 Duo E6300 |
| Memory | 4 GB RAM |
| Graphics | Nvidia GTX 750 |
| DirectX | Version 9.0 |
| Storage | 3 GB available space |
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About this game — FAQ
Can Invention 3 be played single-player?
Yes, Invention 3 is a single-player game.
What languages does Invention 3 support?
Invention 3 is available in: English.
FAQ
Where is the cheapest place to buy a Invention 3 key?
The cheapest Invention 3 key is currently sold by Steam for €0.72. That is the best of 4 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €0.72.
How much does Invention 3 cost?
Invention 3 currently costs from €0.72 — the cheapest offer across the stores we track.
Is Steam an official store or a keyshop?
Steam is an official store — keys come directly from the publisher or an authorized distributor.
Are keys from these stores legal?
Buying is legal — keys come from the grey market, so a small deactivation risk exists. So before paying, check the seller's buyer protection.
Which key region should I pick?
Global activates everywhere. Regional keys (Europe, North America, RU-CIS) only work on accounts from that region — use the Region filter to match your account.
What is an activation platform?
The service where the key activates — Steam, GOG, Epic or the publisher's platform. A key for one platform won't work on another, hence the separate filter.
What's the difference between editions?
Standard is the base game; Deluxe usually adds an expansion or bonus content. The edition filter shows exactly that variant, with no mixed prices.