We have one million SpaceChem Steam keys to give away, with Bundle Stars

UPDATE: Our next giveaway, for Dino D-Day, is live here .

SpaceChem is a puzzle game about building factories to create increasingly complex molecules. It's clever, absorbing, and a great way to test your logical reasoning power. We enjoyed its cerebral charms so much it earned a score of 89 in our review . Now we're teaming up with Bundle Stars to give you SpaceChem for free. We have a million copies to give away, so don't be shy, click through to grab your Steam key.

SpaceChem is just the start of a huge five-part giveaway we're running on PCGamer.com in the coming weeks. We're giving away millions of Steam keys, so keep an eye on the site for the latest offer every Wednesday. As mentioned, this is all in association with Bundle Stars . As well as selling games independently, they specialise in bundling them together to create deals that discount games by up to 97%. This giveaway is your opportunity to build a free Steam bundle over five weeks. To begin, Follow the instructions in the form below to claim your SpaceChem Steam key.

Here's a video of SpaceChem, which should explain things nicely while you wait for the game to install.

A total of 1,000,000 Steam keys are available for SpaceChem, which must be claimed by 17:00 GMT on 2 July 2014. The offer is open to owners of eligible Steam accounts. By taking part in this giveaway you agree to be bound by these terms and conditions and the further rules which can be viewed at www.futuretcs.com .

This promotion is managed by Bundle Stars, a division of Focus Multimedia Limited. Future Publishing Limited are not responsible for the Steam keys relating to SpaceChem. Contact Bundle Stars directly by emailing support@bundlestars.com if you have any questions or concerns about entering your key or downloading the game.

PCGamer

PC Gamer is the global authority on PC games—starting in 1993 with the magazine, and then in 2010 with this website you're currently reading. We have writers across the US, Canada, UK and Australia, who you can read about here.

Latest in Puzzle
A sign reads "HATRED IS POWER"
A demo for a lost videogame based on George Orwell's 1984 has emerged from the memory hole
London Bridge during snowfall
This is the coolest pricing gimmick I've ever seen: the temperature in London determines the price of this videogame
Today's Wordle being played on a phone
Today's Wordle answer for Tuesday, March 11
Wordle answers
Today's Wordle answer for Monday, March 10
Wordle today being played on a phone
Today's Wordle answer for Sunday, March 9
Wordle answers
Today's Wordle answer for Saturday, March 8
Latest in News
A masked man with an axe in the woods
Rebellion CEO seems kind of awed by major studios making massive videogames: 'How do you organize a game that has 2,000 people working on it?'
A young witch watering a smiling mushroom in a magic garden
Here's a roguelite dungeon crawler Steam reviewers call 'a botanical Diablo' and 'like Cult of the Lamb' except you manage a mystical garden
Destiny 2 Rite of the Nine: The Emissary, massive, ominously standing at the edge of a water basin.
Oops! Bungie rolled out Destiny 2's Rite of the Nine event three weeks early, and new loot is already dropping
No Rest for the Wicked Steam early access screenshots
No Rest for the Wicked developer Moon Studios is now 'fully independent' after acquiring the rights to the game from Take-Two
A hunter posing with an absurd Blangonga outfit in Monster Hunter Wilds.
Attention, fashion hunters: There's a Monster Hunter Wilds mod to disable all those obnoxious glowing buff effects that distract from your fits
Fallout New Vegas Key Art
The Fallout season 2 leaks continue with videos of the New Vegas set, including a sign for Mr. House's casino