It's the zombie apocalypse choose your weapon

[TehGingaNinja]

TF2: Three level three sentry guns
And if that don't work, use more gun.
Wouldn't have to break a sweat. I might sub in a top tier Assault Rifle from Mass Effect with heat sinks. Overheating? Who needs it.

 

[UltraDeth]

Lightsaber
Mulcher turret
Krogan BOOMSTICK!

 

[TheVurdmeister]

Blades of Exile - God Of War
Vorpal Blade - Mythology (and Alice, if you wanna be all Poppy-Culturey.)
Dagger of Time - Prince of Persia

Hack and slash as many as I can at once, best for situations of overwhelming proportions. Plus, when you can reverse time, you are almost immortal. >

 

[The Shade]

Zombie invasion, you say?

Spoiler: Good to go!

 

[Jian-Li]

Dragunov sniper rifle
Kilij sword
SKS carbine

 

[Tuesday Night Fever]

They made an Army of Darkness game a while ago, didn't they? Alright... then I'm gonna go with...

1. Boomstick
2. Chainsaw
3. Ash Williams

Groovy.

 

[Thespian]

The golden spear thingy from Lara Croft Guardian of Light. I just loved using that weapon. Infinite Spear throwing!

Portal Gun for fun spear-throwing through portals and stuff, and quick escapes.

Finally, Mass Effect 2's M-920 Cain to nuke huge groups of zombies.

 

[StBishop]

Weaponised zombrex (I don't remember the game sorry).
GDI superweapon from Tiberium Sun.
WH40K Power armour with those massive thunder fists or whatever they're called.

 

[Moonlight Butterfly]

A sniper rifle, a shotgun and a machete.

Covers things nicely.