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