Here is the full list of all 10 Hover Havoc achievements.
Win a game against the AI
Collect 10 power ups in 1 round
Shock every player on screen using the tesla
Kill 2 players in a row in less than 5 seconds
Survive an entire round
Play every level
Get 20 points in 1 round
Kill all players in 1 life
Play with 4 local players
Score no points in a round