Fine, you really want soccer, bombing run, and/or assault?
I'll tremulous it up for you.
Here is the bomb, it spawns in the middle of the map.
The objective is to bring the bomb to the enemy's Reactor/OM
The reactor/OM is invincible, and can only be destroyed in two ways:
Deconstruction and the aforementioned bomb.
The bomb is quite heavy and is carried differently by the two teams.
Humans: Walk up to it and hit "Q" it now is your backpack item, you cannot hold if you already have a backpack (or bsuit). To drop it, do the same thing you do with grenades. Also, you now walk slower than you normally do.
Aliens: Walk up to it and hit "Q", you are now a bomb-toting carrier version of your current class (Marauder, Dragoon, & Tyrant only). Due to the weight, you attack slower, and cannot wall-jump, pounce, or trample. Hit Q again to drop.