Here is the full list of all 19 ARCADE achievements.
Die for the first time
Here are the top ten
66/1!
97...98...99...
1k deaths?
Earn 1 million points or more in infinity mode
To infinity and beyond!
Your first kill. Or not.
Kill your "friend"
A million score in co-op mode
Leave the game after 5kk points via the pause menu
Lose in the "Crystal defense"
Still worthy!