VBSS (Visit, Board, Search and Seizure)*
Essentially piracy on the high seas (in this case Veunus or Mercury)
A small unit is inserted either by helicopter, parachute, or boat on a large vessil and must detain (kill or defeat in CC in game terms) the crew and inspect the cargo for contraband (like secret corporate weapons or Dark Legion aritfacts being smuggled).
Terrain Requirements:
Something set up to look like the top decks of a ship (Can anyone say USS Flagg with some cargo containers on it?) and something for the innards (doom tiles perhaps?)
Special Rules:
Something the covers helo or boat insert.
Attacker takes only elite units and individuals (no support but if you want grunt troops then knock yourself out)
Defender has 25% more, but they are scattered throughout the ship.
*Not to be confused with VBS which is Vacation Bible School and would be Brotherhood vs an army composed entirely of Children of Ilian