#1: Sniper rifles only fire paint rounds, which means getting shot anywhere but the head doesn't do anything. Getting shot in the head changes the color of that players screen for three seconds. Every other gun is a BB gun, making them only moderately more effective.
2#: Your knife doesn't just allow you to teleport and insta-kill other players, but when you throw it also launches your enemy straight into the air and onto the next closest enemy before exploding and killing them both. There is nothing to prevent this, as your knife is also magic and can home in and hit absolutely anyone even if they're behind you. Also, another knife automatically appears in your hand after you throw one.
3#: Getting a 5 kill streak unlocks The Gun. As long as a player is holding The Gun, they are under the effects of every perk in the game and have an extra 600% health. The Gun is a minigun that fires homing cluster rockets, and sounds like a whiny child screaming every racial slur they know when it is fired. When The Gun is fired, the sound it makes completely overtakes every other sound in the game. The cluster rockets The Gun fires do not explode until they hit the enemy, even if that means phasing through walls or the ground to do it. The Gun fires so quickly that rockets quickly fill the entire map, causing everyone to lag out to the point where the game crashes. Upon crashing, whoever had The Gun is deemed the only winner, as everyone somehow ended up on the opposing side during the lag.
EDIT: There may be a double post, apologies in advance.