What machine craft in a nutshell is a game where one can build machine for the land, air, sea, and/or space. There's several parts of it:

• Building/Testing a Machine
  
• Muitiplayer Meetups
  
• Mutiplayer Combat
  
• Challanges

Let's go over them in this order:

This is simple: You build/edit and test a machine here. You can set the map it starts in, the opposite machine, and a few other things. While it's easy to build, explaining it is a little tricky, check out these two videos by BobDaBiscuit:

After you selected a default or built a new one, you can show it off here: There's 5 base servers: US(East Coast) JP(Tokyo, and as of publishing, the most populated) EU(Amsterdam) Asia(Signapore) and AU(Melborne). You can also try and host a Local server if you want to play with others closely. There's two main way to play: Meetups and Combat

Meetups are simplying goofing around with builds and showing what cool stuff you found on the internet/built. Usally, servers will have lax restrictions on builds, and servers will prevent any damage.

Wanna see if your creations can do battle? Combat servers will have the damage on, and will etheir have a FFA or a Team Style Deathmath. Most of the time, they'll have some restrections on what one can use, like weapons/weight/size or a few other factors, like boosters. Check these out, as they might hamper with your machine, or possibly prevent it all together.

Wanna see what your machine can do? These are mutiple random tasks for your machine to complete, see if you can make something that can complete them all!

That's right! It's free, currently the planned DLC is cosmetics, so look forward to a game where winning in combat depends on teamwork and/or build quailty.

I hope this gives you a brief rundown, I do hope to meet you ingame soon!

Special thanks to Bob Da Biscuit for showing how cool it is on youtube and the tutorial above!