What's your all time favorite FPS gun?

It's rather underwhelming in appearance, but any bolt action rifle. It's both a challenge and a thrilling weapon type, having to time your shots, use cover wisely, aim carefully and quickly, etc.

My favorite gun though is the PS90, but as far as I know it hasn't been in any game that I've played.

FRAPS

Samus Aran's arm cannon in Metroid Prime, especially after you're able to change its form/properties with later addons.

Cyclone from Perfect Dark, 2000 rounds per minute and unique reload.

All about dat Beretta

Pizelgun from antichamber and portalgun from... portal

From Borderlands 2: SWORDSPLOSION

Reason: Fires a single projectile in the shape of a sword which explodes upon impact, spawning three smaller swords, which also explode on impact.

probably the rocket launcher from Halo 2. i loved the lock on to vehicles so much. I also cant think of too many note worthy guns off the top of my head.

• Mine's most things from Serious Sam 3 BFE

The Mk22 Mod 0 "Hush Puppy" tranquilizer gun.

Rocket launcher from all Quake series.

I believe this is the gun I've had most fun with.

Desert eagle is really great, but I would go with shotgun.