Tunnelers?

[creeper destroyer]

I'm kinda goin shellshock live here, but what if you put in some sort of unit that is released underground when the player gets too OP? Like if a map creator puts in a unit limit, they have the option to turn on these tunnelers, which (duh) tunnels through land, hits frontline units and destroys itself and the unit on contact, and keep being released until the unit limit is once again satisfied? It would ONLY hit units in the front, so it's not too OP. I got this from shellshock live's weapon tunneler, which once it hits land, it digs under doing no damage, but apparently gravity is reversed so it rises, exploding when it resurfaces. The steam version of SSL is my 2nd favorite game currently, CW3 being the first. Love em both.

Also this is my biggest post yet. Go me :P

[TDplay]

Suppose you could also release these when you build turrets too densely packed across too much area. But what can the player do to stop them? Are we going to play CW4 to hard-set unit limits? That already exists in CW3 (a map dev can set unit limits).