The Legend of Zelda Breath of the Wild is one of the best reviewed games of all time, with critics and fans being glowing in their praise of the game.

In a newly released documentary, Nintendo charts the development of Breath of the Wild and reveal some staggering secrets about the game.

The three part series looks at how developers wanted to “break the conventions of the Zelda series” and shows concept art created for the Nintendo Switch and Wii U game.

One staggering section shows how a young member of the Breath of the Wild team suggested having UFOs in the game that attack Hyrule Castle.

Breath of the Wild director Hidemaro Fujibayashi said development on the game began in “earnest” in January 2013 and the original plan was to release the game in 2015.

But the launch was delayed to make it as “interesting as possible”.

He said his team wanted to break “the conventions of the Legend of Zelda series from very start of development.”

Technical director Takuhiro Dohta also said “breaking the conventions of the Zelda series” became a catchphrase among the Breath of the Wild team.

He said many conventions found in the Zelda series were due to the technological limitations of the time.

Art director Satoru Takizawa said in the Nintendo offices there was a big white board where the team jotted down “a lot of interesting ideas”.

He said younger members of the team came up with ideas that UFOs could invade from space and abduct cattle in Hyrule.

They also came up with the idea of giant weapons firing lasers while Link ran across the battlefield between them.

Legend of Zelda Breath of the Wild secretsNINTENDO

A member of the Zelda Breath of the Wild development team suggested including UFOs that attack

The latter idea sounds like the beginnings of the Guardians enemies in Breath of the Wild – who can fire lasers at Link from far away.

Sample videos were also created – and Satoru said these far out ideas helped to create a game that felt “new” and was a great “starting point”.

Takuhiro said the development team imagined a vast world where players could do things like enter a house seamlessly.

They created an old-school 2-D style Zelda game as a prototype to test the game’s structure and components.

Zelda Breath of the Wild secrets revealedNINTENDO

The Breath of the Wild development team also created a 2-D prototype

Breath of the Wild director Hidemaro said the old school top-down play style of the 2-D Zelda games is what the current game “initially resonated with”.

He added: “When we decided to implement in 3D and started to add more and more complexity and tweak scenes for greater impact, we began to realise the tremendous volume of work that needed to be done.

“That experiment really showed us how great the title could be, but also the amount of work that would be required to make it.”

The article first appeared in express.co.uk