There are some opponents you want to defeat. There are some opponents you want to kill. Then there are some opponents you want to
stab babillion times, followed by unloading an
M61 Vulcan Gatling gun,
carpetbombing the entire area,
spamming the corpse with a combination of
Wave Motion Guns and
Kill Sats,
nuking, then
standing on them while dancing horribly before falling on your back (on them), and
just to be sure, driving them into the ground with a jackhammer.
Sometimes, the act of killing an opponent can be completely overdone. A prime example would be shooting an enemy until they're almost dead, then, to finish them off, completely blowing up their body and everything else in a five mile radius. All in all, it's a waste of resources, tactics, and time.
...but it's always, always
worth it. Always. Especially if the enemy is just hanging on up until the end. Actually,
that's just cruel.
Often part of a
Curb-Stomp Battle or
Humiliation Conga, if said conga ends with the villain's death. If not then it will often happen to the nameless
Mook or other poor minion who happens to be in the hero's (generally the
Anti-Hero's) way. If you're feeling
lampshadish, another character may remark
"I think he's dead already" near the end of it.
If done right, you'll probably have the pleasure of saying
No One Could Survive That without having to doubt.
Or.... maybe not. Can sometimes result in a
Cruel and Unusual Death. Every so often, it will actually
worsen the situation by crossing the
Godzilla Threshold.
In a conservative sense, Overkilling is grossly inefficient (a.k.a
Awesome, but Impractical) because of the inherent risk of wasting time and firepower: The weaker and less numerical a target of attack is, the greater the overkill is and the loss of time and firepower put into the attack.
The
entire point of
Multi-Directional Barrage, especially
More Dakka,
Macross Missile Massacre.
Ludicrous Gibs often results. The more ludicrous can become
Apocalypse Wow.
Compare
Chunky Salsa Rule,
Rasputinian Death,
Critical Existence Failure,
Videogame Cruelty Potential,
Surplus Damage Bonus,
Disproportionate Retribution, and
Deader than Dead.
Contrast
Cherry Tapping,
Once is Not Enough,
Godzilla Threshold.
Examples