"Doink" Kill anyone with a rocket launcher or guns akimbo with a sword, while standing in plain sight
"Headshot" Finish anyone off with a gun bullet to the head
"Marksman" Finish 5 people off with a gun bullet to the head
"Sniper" Finish 10 people off with a gun bullet to the head
"IT'S A JOB, DAD" Finish 20 people off consecutively with gun bullets to the head
"Run Through" Kill 2 people (the first guy, and the guy behind via splash damage) at once with a spear
"Roadkill" Get killed by cars 20 times
"Road Rage" Kill with cars 20 times
"Can't touch this" Kill 30 people without getting hit ONCE
"Hammertime" Knock down an opponent's health with any weapon, than finish him with a hammer
"MR NEIGH NEIGH" Kill someone on a horse
"One Two Punch" Hit someone with these weapons in exactly this order, and make sure he dies: Rocket L, Rocket L
"5 hit combo" Hit someone with these weapons in exactly this order, and make sure he dies: Rocket L, Gun, Gun
"Aerial Ace" Knock someone into the air with a rocket, than rocket jump up to him and hit him again with any weapon
"Magnitude" Use the power of the ground to kill 5 people
"Earthquake" Use the power of the ground to kill 10 people
"Seismic Toss" Use the power of the ground to kill 15 people
"MEDIC!" Call for a Medic
"USE MORE GUN" Use all 3 default firearms on opposing players in quick succession
"Got yer nose" Walk up to a player, stand infront of him, and run off before he gets a chance to shoot you
"Don Quixote" Attack random things until you finally kill a hidden player
"KaBOOOOOM" Using any weapon, kill 8 people all at once
"PK CANNONBALL" Use a rocket to propel yourself at a player, than kill that player with a weapon of your choice
"It's a trap" Kill 5 players by ambushing them
"FYI I AM A SPY" Kill 10 players by ambushing them
"Sprinkler" Stand on one spot, firing guns akimbo around in circles, and kill 5 players without dying
"DO A BARREL ROLL" In a plane, use a barrel roll to actually evade an enemy's fire, than down his vehicle
"Loop de loop" In a plane, use an aerial loop to actually evade an enemy's fire, than down his vehicle
"Kamikaze" Kill someone on the ground by slamming them with your plane at full speed
"Dynamic Entry" In a plane, enter any building with it on fire and use the explosion to kill 5 people, without dying yourself
"Side Smash" In a car, knock someone else in a car into a person to his side
"Up Smash" In a plane, come up from under a player on fire and use the explosion to kill him, without dying yourself
"Down Smash" In a plane, fly directly into a battlefield on fire and use the explosion to clear it, without dying yourself
"OH DAMN." In a plane, get shot down and use the explosion to do damage to one player, but not kill him
"Clotheslined" In a plane, hit a player on the ground into the air, loop, and hit him twice to kill him
"Bad Driver" Hit another person in a car, while in a car
"Offensive Driver" In a car, kill another player in a car without being spotted
"Mirror, Mirror" Get shot by a player with any weapon, and instantly shoot back to kill him