Indie hit Starbound has shifted one million copies in a month

Open-world 2D extraterrestrial adventure Starbound has shifted over a million copies in its beta state, developer Chucklefish announced on Twitter.

The Starbound beta was only made available in mid-December, and the UK developer has also notched up $5.1 million of revenue from 187,733 preorders on its own site.

At time of writing, Starbound is third on Steam's top sellers chart, behind fellow Steam Early Access titles DayZ and Rust.

“Starbound is already extremely playable and contains a vast amount of content, however we decided to release the game as a beta through early access to ensure the community gets a chance to help us shape the game," said Chucklefish.