A physics game where every level gives you random tools and no set solution. Now you can also bring a friend on the quest to uncover the mysteries of the asteroid.

Freeze anything (yes, even your friend)

Glue anything (yes, even your friend)

Trap anything in a bubble (yes, even your friend)

Everything interacts with everything

There's no set solution for a level. Each one can be solved in almost endless ways.

Find YOUR creative solutions. Or your partner's terrible ones.

• There's Someone Underground: a co-op run for two players on one screen

• Five single-player runs, each with its own difficulty and modifiers

• Endless Descent: you get one life. How far down can you get? Brag about it on the Steam leaderboard

• The Underdome: a two-player arena. Last one standing takes the round

• 100+ handmade levels

• 20+ tools that work on the level, on each other, and on your partner

• Every run is different: rush for the exit, or take the time to gather powerful tools for the tougher levels?

• 20+ narrative vignettes

• Play online with Steam Remote Play Together: only one copy needed

• Full controller support. Co-op and the arena need at least one controller; player one can use mouse and keyboard

In 20XX, a massive asteroid hurtles toward Earth, only to stop at the last moment, hovering above the planet. Within its core lies a wealth of rare materials, sparking a global mining operation that has been extracting resources for 25 years.

You play as Gustav, a seasoned worker selected for a high-stakes mission. A strange signal emanates from deep within the asteroid, and a team is sent to investigate. But as you descend into the heart of the asteroid, reality begins to warp: time and space bend, and your team vanishes, leaving you alone. With no way to return, your only option is to push forward.

Will you reach the core and uncover the mystery of the asteroid, or be lost forever in its depths?