The Super Heavy Infantry Vehicle, or S.H.I.V., is an advanced weapons platform that can be deployed in place of a humansoldier. While extremely capable in most combat scenarios, any damage to the S.H.I.V. will require lengthy repairs.
While stronger than the average Rookie or Squaddie, S.H.I.V.s still end up quite weak in comparison to higher-level soldiers. They are useful when faced with a shortage of able-bodied competent troops, although a few low-level soldiers should be taken in the squad to get promotions.
S.H.I.V.s are very powerful against Chryssalids because of their immunity to poison and zombification. If you have the S.H.I.V. Suppression upgrade from the Foundry, they can also be helpful in stopping ranged units from supporting the Chryssalids.
Contrary to what one might expect, a S.H.I.V. can rescue civilians on a Terror Site mission, though they do not emit a soundbite when reaching the civilian.
In the same vein, a S.H.I.V. can activate objectives and collect Meld from canisters.
A S.H.I.V.'s name is automatically generated as THUNDER followed by the production number.
VERY IMPORTANT! Due to a bug that occurs most of the time, when parking a S.H.I.V. into a 1 tile doorway with either a terrestrial door or an energy barrier and not crossing it in the same turn, the door becomes impassable for all (even the S.H.I.V.) blocking any future traverse! This is most devastating on maps that feature areas that are only accessible through a 1 tile doorway like the Alien Base, Battleship, or even the Temple Ship, but also affects Earth maps and terrestrial doors. This can ruin your current unsaved progress or even worse, your whole Iron Man game! Here is a video showcase: https://www.youtube.com/watch?v=y8IF8-cXlCQ
Hover S.H.I.V.s may deploy on missions without their weapon.
S.H.I.V.s are called "Heavy Weapon Platforms" in the original UFO: Enemy Unknown (1994). The ground models are referred to as Tanks, and are available with Cannon, Rocket Launcher, or Laser Cannon armaments.
"Shiv" is a slang term for an improvised knife-like weapon.