Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Beat fifty Hard levels	Beat fifty levels against Hard AI.
Beat fifty Normal or Hard levels	Beat fifty levels against Normal or Hard AI.
Beat ten Hard levels	Beat ten levels against Hard AI.
Beat ten Normal or Hard levels	Beat ten levels against Normal or Hard AI.
Beat the first random level (Normal or Hard)	Start beating the AI.
Death conquers... all!	Complete Chapter two.
End of the journey	Complete Pawn of the Dead.
Long live the Queen!	Score fifty in Queen vs Zombies Mode.
Queen Capture	Capture/infect the enemy AI Queen (without seeing solution) (the first move doesn't count)
Queen of the undead	Complete Chapter three.
Undead attack!	Complete Chapter one.