Here is the full list of all 16 8-Bit Fiesta achievements.
Speedrun a gold time
Beat Jesus in wolly bomb
Crush the clown
Drown the dog
Please don't become a pilot
You have no fear of death
Kill Schwinghammer
Finish 10 tournaments
Unlock 3 characters in storymode
Unlock all characters
Beat story mode lvl 1
Beat the first boss in no death run
Oh beer god what happened?
Beat world 2 in no death run
Beat all levels in no death run
Kill the dictator