Buy I/O PC CD Key

Where can you buy the cheapest I/O key for {6}? Check and compare prices from 1 stores among 1 offers on XD.deals. The lowest I/O price on keyshops is at $2.99 (0% off).

Release: 26 Jun 2025
Keyshops
Unavailable
Buy in Official Store:
$2.99
Buy in Keyshops:
See price history

Official Stores (1)

DRM:
Steam
Steam
Steam
I/O
Windows
25w ago
DRM:
Steam
Steam
$2.99
Historical Low Deal
Historical low

About I/O

I/O - about the game

I/O is a minimalist but deeply strategic puzzle-arcade game where every bounce matters — and one wrong move could end your run.

At its core, I/O is about survival. You bounce between two platforms filled with numbered cells. Each bounce reduces a cell’s value — and if you ever land on a cell showing zero, it’s game over. Unless… you’ve got a power to save you.

Plan Your Moves. Adapt Fast.
Each run presents a fresh grid and unique challenge. Think ahead, redistribute cell values, and use your limited powers wisely. Every 5 stages, you’ll enter Split Mode — a tactical break where you can transfer half the value of one cell into another, giving you a chance to balance the board and extend your life.

Choose Your Powers
Before each run, pick two powers to bring with you. These are game-changers:

  • Safe Bounce: Survive a 0 hit once.

  • Value Boost: Double the value of a cell.

  • Overcharge: Double your score for one bounce.

  • Zero Cleanse: Turn a 0 into something usable.

  • And more...

Each power has limited uses, so timing is everything.

Progress & Unlock
Earn score by surviving longer and bouncing smart. Use that score to unlock new power-ups in the Power Store, giving you more tools and strategies for future runs.

Key Features

  • Endless, score-based gameplay focused on strategy and adaptation

  • Power-up system with 8+ unique abilities

  • Split Mode for mid-run cell value redistribution

  • Clean, responsive visual design

  • Strategic layer that rewards planning and risk management

  • Steam support and progression tracking

  • Highly replayable with new combinations and runs each time

How long can you stay in the loop?

Interface:
English

Age rating

Unavailable

Minimum:

  • OS: 7 (SP1+) / 10 / 11
  • Processor: Dual-core from Intel or AMD at 2.0 GHz
  • Memory: 2 GB RAM
  • Graphics: Integrated GPU (Intel HD 4000 or better)
  • DirectX: Version 11
  • Storage: 200 MB available space
  • Additional Notes: A mouse is required. Keyboard optional.

Recommended:

  • OS: 7 (SP1+) / 10 / 11
  • Processor: Dual-core from Intel or AMD at 2.0 GHz
  • Memory: 2 GB RAM
  • Graphics: Integrated GPU (Intel HD 4000 or better)
  • DirectX: Version 11
  • Storage: 200 MB available space
  • Additional Notes: A mouse is required. Keyboard optional.
Historical low
Price history from official stores
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Price history from keyshops
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FAQ

8 questions

Before you start looking for a cheap I/O key, check the essentials. Developed by CES Studio. Published by CES Studio. PC released date: 26 Jun 2025. Genres: Indie, Casual, Early Access. Categories: Family Sharing, Single-player.

Q

Where to buy a cheap I/O Steam key?

Using our price comparison and verified discount codes, you can buy a I/O key for as low as $2.99. This deal is available at Steam and is among the cheapest offers on the market. All keys listed on XD.deals are delivered digitally and eligible for instant download after payment. Prices already include processing fees and applied promo codes, so you always see the lowest I/O price on PC. Check the I/O price history to buy at the best moment.

As of our last update (we refresh Steam pricing multiple times a day), the I/O Steam price is $2.99. You can save an extra ~6% by paying with a discounted Steam gift card.

Our price tracker covers both official retailers and key marketplaces, so you can find I/O on sale even outside seasonal promotions. We currently detect 1 active offer from official stores and keyshops. Check the table above, compare against the historical low, and set an alert so you never miss the next price drop.

Based on our data, I/O is not currently available on GeForce NOW. You will need to run it locally on your PC. Browse games available on GeForce NOW.

Yes. I/O has an official page on the Steam Store. You can also buy a I/O Steam key from third-party sellers. Our price comparison currently includes 1 offer with Steam DRM. Pick one to ensure your I/O download happens on Valve's platform.

Not at this time. Valve marks I/O as Unsupported on Steam Deck. Keep an eye on XD.deals - we track Proton updates and community fixes. Browse games that are Steam Deck Verified or Steam Deck Playable.

I/O does not appear to be available on PC Game Pass, EA Play, Ubisoft+ or any other PC subscription service at this time. Your only option is purchasing the game - use XD.deals to find the best price.

No - XD.deals is not a store. We are a price-comparison service that tracks the best I/O deals across official stores and verified keyshops. Click "Go to Store" next to any offer and you will be redirected to the retailer's website to complete your purchase.

Best prices for I/O

1 Steam Steam Official
$2.99

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