Gravedigger

 is a Tier 5 Tank that upgrades from Constructor, Nightworker and Griefer at level 60.

Design
The is very similar to the Nightworker, but its proportions are changed to match that of the Constructor. Its barrel is now quite wide at its base, nearly the entire width of the tank before tapering to the same width as Constructor's near its tip. Its barrel tip is identical to Constructor's.

Technical
As a Nightworker/Griefer branch, the can become invisible by staying still. Its blocks seem to have the same stats as Constructor's.