Besiege

I made a vehicle for use to get this very easily

Push cn_down to bring up the Workshop menu, push cn_RB to go to player created vehicles, push cn_back to bring up the search bar and search for "BreadWall". Its literally a vehicle that is a wall with a torch and grenade

All you got to do is load the vehicle and start the level, dont push any button afterwards! The torch will detonate the grenade and blast the blocks forward toward the wall and destroy it! If you havent go the achievement for doing a level in under 2 seconds, you should get it using this build

Go to the workshop and search for "Rube"
There are a ton of cool and interesting vehicles you can use made just for this achievement.

The other guides aren't wrong. It's just really easy to search for "rube" and then you can take your pick while also seeming a few different takes on the same idea.

Probably better to watch the video, but here's a written guide:

1. Load up the mission Perimeter Wall in the IPSILON campaign.
2. I build a machine with a ton of wooden logs/cannons to be used as debris to hit the buildings.
3. I put some bombs on the back side and bottom at the back. Too many and you'll see the debris shoot too far.
4. Make sure the machine is still up in the air, start, and let it drop.
5. The debris/parts will shoot up and forward, sometimes hitting the walls.

*It is very hit or miss, not super reliable. However, if you catch a building on fire. LET it burn, and it'll count.*

*Note: This is the harder Rube Goldberg achievement. The other one is easier*

Got this first try using vehicle: Auto Last Level . Just download the vehicle start the level and just watch ... Don't press any other button ..

Got this first try using vehicle: Auto Last Level . Just download the vehicle start the level and just watch ... Don't press any other button ..