Here is a list of All 35 Kill Bonuses (in order as listed in game including point values).
Kill Bonus Name: Point Value - Description
Headshot!: 10 - Kill an enemy by shooting them in the head. Crotch Shot!: 12 - Kill and enemy by shooting them in the crotch. Butt Shot!: 30 - Kill and enemy by shooting them in the butt. Assassin!: 25 - Kill an enemy by shooting them in the back of the head. Surprise!: 20 - Kill the enemy by burrowing a saw through the ground. Direct Hit!: 7 - Kill an enemy with a direct hit from an explosive weapon. Splish Splash!: 12 - Kill and enemy from splash damage on a non-explosive weapon. Spree Ender!: 25 - Kill an Enemy who is on a killing spree. (15 kills without dying). Reflection!: 10 - Kill an enemy by reflecting attacks off your Katana/Static Field. Juggerkill!: 37 - Kill and Become the Juggernaut. Show Stopper!: 25 - Kill an enemy who is carrying the flag. Slasher!: 10 - Kill an enemy with the Katana. Hot Hot Hot!: 5 - Set an enemy on fire and let them die by the fire. Haunted!: 12 - Kill an enemy after you are already dead. Kill Steal!: 5 - Kill an enemy who is low on health and fighting someone else. Disco Inferno!: 7 - Kill an enemy while you're on fire. Capture King!: 12 - Kill an enemy while capturing a flag in domination. Defender!: 12 - Kill an enemy who is capturing your flag in domination. Juiced!: 5 - Kill the amazing Juice-Tin. Rad!: 5 - Kill the almighty AddisonR. Slevanator!: 5 - Kill the legendary MiKE. Survivor!: 7 - Kill an enemy when you have only 1 HP remaining. Speed Shot: 12 - Kill an enemy while traveling at 35 MPH. Show Off!: 12 - Kill and enemy while carrying the flag. What Shield?: 12 - Kill an enemy who has over 20% shields in 1 hit. What Was That?: 30 - Kill an invisible enemy. Corpslosion!: 37 - Kill an enemy with a sticky grenade attached to a corpse. Thanks!: 25 - Have an enemy kill someone else off your Katana/Static Field. Sticky Icky!: 2 - Kill an enemy with a sticky grenade. Off Da Wall!: 5 - Kill an enemy with a bounce shot. Homeward Bound!: 2 - Kill an enemy using a Homing Weapon. Day Tripper!: 2 - Kill an enemy with the Acid Cannon. Lopper!: 2 - Kill an enemy with the Blunderbuss. Dracula!: 2 - Kill an enemy with the Vamp Charger. Disabled!: 5 - Kill an enemy after stunning them with an EMP.