Bad Yolk and Team17’s construction sandbox launches today with a brand new update that further expands the creative possibilities.


Tuesday, 26th January 2020 – Team17 and Bad Yolk have announced that creative sandbox, Main Assembly, has today left Steam Early Access. Featuring a comprehensive array of freeform building tools, players can now construct an even more significant number of intricate machines and robots thanks to a brand new update launched alongside the game’s full release. The Final Frontier content introduces players to zero gravity, with a new sandbox map that includes a space station, a new space-based challenge level, the ability to add rocket engines and lasers to creations, and cosmetics so the in-game drone can cosplay as an astronaut.

Main Assembly has continually expanded during its Early Access phase, adding aquatic systems, environments, and Bot Brawls (a new game mode for players to battle against each other and their creations through online multiplayer) to the game over the last few months, regularly providing more activities for players.


Houston, we have a trailer:

Main Assembly key features:

  • Freeform building: Construct any robot or contraption imaginable and customise them with numerous cosmetic parts
  • Solo & multiplayer sandbox gameplay: Work individually to collect 156 stars in 24 single-player challenges or compete against each other in online multiplayer activities. Share inventions over Steam Workshop, and enjoy endless gameplay possibilities
  • Powerful visual programming: Harness the power of Main Assembly’s visual programming language to set up unique controls for creations, and even automate them with various types of sensors
  • Advanced physics: Experience aerodynamics and robot destruction; fly, drift, and destroy your creations.


Joel Jonsson, CEO and Creative Director, Bad Yolk, said:

“The road through Early Access has been incredibly rewarding, and we’re now at the point where we’re ready to unleash the full potential of Main Assembly. Working on the zero gravity content was the one giant leap we wanted to make before we left Early Access, and now there are a whole host of tools and toys to play with, letting players create bots great and small to experiment with and use in the sandboxes and challenges. We can’t wait to see what else players can come up with!”


Louise Chamberlain, Producer, Team17, said:

“At Team17 the collaboration with Bad Yolk has yielded some really incredible results, and we’re now ready to lift-off with a brand new update that will usher in the full version of this incredibly detailed sandbox. We’ve had a huge amount of fun creating bots and machines and increasing the amount of challenges, maps, and freeform building tools available to players, so all that’s left to do is to let players loose with the creative tools!”


To keep up to date with all the information on Main Assembly please like us on Facebook, follow us on Twitter, and join us on Discord.

About Bad Yolk Games

Bad Yolk Games is what happens when a few experienced ex-AAA game developers decide that it’s possible to make great games without sacrificing health or happiness in the process. We’re committed to diversity, inclusivity, and mutual respect, and we believe that this will show in our games. Our first title is Main Assembly, a physics-based game where you build robots to overcome challenges and for the simple joy of creating, is available on Steam Early Access. Visit for more information.

About Team17 Group plc

Founded in 1990, Team17 Group plc is a leading developer, video games label, and creative partner for developers around the world. Floated on AIM in 2018, Team17, with its extensive portfolio of over 100 titles, embodies the spirit of independent games. In addition to the award-winning Overcooked!Yoku’s Island Express, and the iconic Worms, which celebrated its 25th anniversary in 2020, Team17 has helped bring critically acclaimed titles including Moving OutYooka-Laylee and the Impossible Lair, and The Escapists to gamers everywhere. Visit for more info.