Forgive me if this has been suggested before. [This if for the new update with new weapons (MG, rocket launcher)
The gamemode has two teams, defense and offense.
Defense is stationed in a large fort, about 15x15x20
The tower has 4 planted MG's, in front of windows on the front of the fort, pointing at a line in which the offensive team will rush in
The defensive team has access to the MG's and grenades. They also cannot break blocks.
The offensive team is only equipped with spades, in which they will use to destroy the fort.
The offensive team will run down a lane, in plane sight of the MG's (think Plants vs. Zombies), and, with their spades, just wack at the bottom of the fort.
The fort doesn't have a way to the top part, for obvious reasons, and only the bottom half will be breakable.
When the bottom is destroyed, it will cause the tower to fall, thus allowing the offensive team to kill the defensive with their spades, but the defensive still has a chance, one can sprint to the start of the lane in which the offensive team spawned, and automatically win the game (still working on this.)
Defensive can win by either doing that or killing all of the offensive team members.
[wip any suggestions are accepted...]