Here is the full list of all 35 Hot Shot Burn achievements.
Get 100 kills
Unlock all Wizardo skins
Kill 3 other players in one round
Kill any character after your bullet bounces 7 times
Kill someone by shooting through a warp
Unlock Wizardo
Get 50 kills
Kill any character after your bullet bounces 3 times
Win a match for the first time
Kill yourself while being the Survive To Win challenger
Eat 10 nachos
Unlock Luna
Get 10 kills
Eat all nachos on any map during one round
Unlock Bongo
Win 50 matches
Win during Sudden Death
Eat 1000 nachos
Kill any character after your bullet bounces 5 times
Kill someone by deflecting a bullet
Get 10 kills using environment only
Get 10 kills using Deathtouch
Get 10 Necro kills
Cancel 1000 bullets
Kill someone by teleporting on them
Kill someone by teleporting your dead body on them
Win any round without using your weapon or ability
Kill 3 other players and yourself in one round
Win a match as Dr. Peakl without shooting
Win a match as Wizardo without shooting
Win a match as Chuck without shooting
Win a match as Bongo without shooting
Win a match as Mia without dashing
Win a match as Umad without shielding
Win a match as Luna without entering stealth