Complete the indicated task to unlock the achievement.

Achievement	How to unlock
All Star	Unlock the Bronze, Silver and Gold achievements.
Billy No Mates	Play the standard game mode with 4 AI.
Billy Some Mates	Play the standard game mode with 4 friends.
Blink	Play the standard game mode and survive for 1 second.
Bronze	Reach the top of the leaderboard for the standard game mode with 4 AI on an average difficulty of easy.
Gold	Reach the top of the leaderboard for the standard game mode with 4 AI on an average difficulty of hard.
Lemming	Play a standard game and survive for less than 1 second.
Leonidas	Play the standard game mode and survive for 300 seconds with 4 AI on an average difficulty of hard.
Party Time	Play the standard game mode with 4 friends using the party popper cannon skin.
Sierra 117	Play the standard game mode with your name set as "JON" and survive for at least 117 seconds.
Silver	Reach the top of the leaderboard for the standard game mode with 4 AI on an average difficulty of normal.
Spartan	Play the standard game mode and survive for 300 seconds.