Mass Effect 3 designer maps out a Mars Rover easter egg kept hidden for 10 years Commander Shepard looks down the sights of a gun at a chirpy mars rover

Mass Effect 3 is full of vast, horrifying robots. But if you'd like to meet a more whimsical mechanical buddy, one of the game's original developers has revealed how to activate a long-lost Mars rover easter egg.

During an early mission to Mars, Shephard might stumble across a 4×3 grid of solar panels next to a shuttle. Speaking on the game's subreddit, former Bioware designer Richard Boisvert explains that walking through the grid in a certain panel will trigger an easter egg that, to the best of his knowledge, has never been discovered.

"10 years ago I put an easter egg in the mars mission of ME3, and as far as I know no one ever stumbled upon it," Boisvert writes. "At the beginning of the mars mission, feel free to walk through the nearby solar panel array in the following way to see it."

A map outlining how to unlock a Mass Effect 3 easter egg.

(Image credit: Richard Boisvert)

Lo and behold, the first comment from Redditor Tuskin38 shows that, upon completion, a chirpy wee rover will emerge from the shadows, approach Shephard, and give the hardened space captain a light now. Who said organics and synthetics can't get along, eh?

While knowledge of how to summon the rover has been a decade-long mystery, fans have been aware of its existence for some time. Last year, Marcus_Khaar used a free camera mod to clip out of the game's maps, finding the hidden rover tucked away. I particularly love how the bot isn't a bespoke model—rather, kitbashed from various parts of other models.

It's neat to see this buried robot carry over into the trilogy's Legendary Edition untouched. But elsewhere, BioWare has been busy making tiny, welcome changes to the series—from misaligned visors to Pluto's fresh new look.