Chassis is the "body" of your machine. It has several randomly placed slots where you can install other spare parts. Each part has its own type of slot. Weapon slots are hexagon-shaped, while slots for gadgets have square shapes. You can't place a part into the slot meant for another type of parts. The number and type of slots are completely randomized, but usually there can't be more than three.
There are currently eight types of chassis:
- Pyramid (Opens on Stage 10)
- Whale (Opens on Prestige 1 Stage 1)
- Diamond (Opens on Prestige 1 Stage 10)
Chassis has two random parameters which depend on the chassis' Tier (wooden/metal/military/golden/carbon), the number of Stars and its level:
Each chassis has a certain Power capacity. If the Power capacity of your chassis is 10, you can't install a Chainsaw that requires 11 Power onto it. The only way to increase the Power of your Chassis is to fuse an Power Toolbox into it. Power toolboxes can be found in Supply Boxes.