Zero Stress King: Idle Defense — cheap CD keys, compare prices
Is it worth buying?
- Reviews are solid. (Steam 87%)
- The price is well above its low (was €3.75) — worth waiting for a drop or setting an alert. Notify me on a drop →
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
Zero Stress King: Idle Defense is a brief, low-key incremental game wrapped in tower-defense trappings, though enemies never actually breach the walls, held off by a stream of lava. The game was independently developed and published by Pauloondra in 2026.
Best price today
€6.49
all-time low: official €3.75 · keyshop €3.93 (+73%)
The cheapest Zero Stress King: Idle Defense key right now costs €6.49 at Steam. The lowest price we have recorded for this game: €3.75.
The average low over the past 4 months was €3.75.
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.
There are also offers of another kind (Gift) — show (1)
These are not ordinary keys. A gift is usually region-locked and arrives through someone else's account — if the region does not match, the game will not activate. An account means you get someone else's login: the game never becomes yours, and it breaks Steam's rules. A DLC or a bundle is not the base game. That is why none of them count towards the price at the top of the page.
Lowest — official stores
€3.75
Aug 2026
Lowest — keyshops
€3.93
Aug 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €3.75 | — |
| Sept 2026 | €3.75 | €4.20 |
| Aug 2026 | €3.75 | €3.93 |
| Jul 2026 | €3.75 | €4.20 |
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
Price alert Catch alert Price alert
Confirm in our Telegram bot — no account, no spam.
All-time low so far: €3.75
System requirements
| Minimum | |
|---|---|
| OS | Win 10 |
| Processor | exists |
| Memory | 4 GB RAM |
| Graphics | not really |
Similar games
Video reviews
16:17 Zero Stress King Idle Defense: 10 Advanced Tips You NEED to Know
Game Launch Central
1:56 2 Minute Game Review – Zero Stress King: Idle Defense
Sausage Mahoney Gaming
2:51 3 Minute Game Review – Zero Stress King: Idle Defense
Sausage Mahoney Gaming
Reviews are made and published by independent YouTube channels; they load only on click.
About this game — FAQ
Can Zero Stress King: Idle Defense be played single-player?
Yes, Zero Stress King: Idle Defense is a single-player game.
What languages does Zero Stress King: Idle Defense support?
Zero Stress King: Idle Defense is available in: English, French, Italian, German, Spanish - Spain, Japanese, Korean, Polish and 11 more.
Does Zero Stress King: Idle Defense use Steam Cloud saves?
Yes, Zero Stress King: Idle Defense uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a Zero Stress King: Idle Defense key?
The cheapest Zero Stress King: Idle Defense key is currently sold by Steam for €6.49. The lowest price we have ever recorded for this game: €3.75.
How much does Zero Stress King: Idle Defense cost?
Zero Stress King: Idle Defense currently costs from €6.49 — 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.