I'm bored and thought this might be fun; I hope it catches on.
I'll start with a very easy one.
Demons Invade Mars,
It's always Summer in Hell.
Grab your damn shotgun!
Haikus usually have a reference to a season, but don't have to.
I kind of cheated with the contraction.

Doom?

*ahem*
Cold L.A. winter
No one steals our chicks and lives
Oh, and there's O.J.

Yes it was Doom, I don't know yours Kaidane.

o_O

umm...Duke Nukem 3d?

Correct.

OK that was easy, unfortunately I'm too lazy to think up a haiku so someone else take my turn.

it is Micheal's turn since he guessed the doom
(that rhymes)

snow falls every night
his love for her
pain to kill
(not painkiller)

DEAD ON!

"baseball wrong. Man with 4 balls cant walk"
WHO WANTO SOME WANG??

That's not a haiku.

Hacking and slashing
through endless hellish dungeons
ultimate evil