Get the following acheivements by completing the corresponding tasks during the game.

Apocalypse:
Stay alive long enough for the screen to accumulate 20 enemies then defeat them

Crystal Ninja:
During one game on Standard difficulty level or lower score 10,000,000 points or more

Crystal Rookie:
During one game on Standard difficulty level or lower score 10,000 points or more

Immortal:
On standard difficulty level or higher get 1,000,000 points without losing a life

Nerves Of Steel:
Without using any Smart Bombs get 1,000,000 points

Crystal Master:
During one game score 1,000,000 or more points

Life-Saver:
On Standard difficulty level or higher have 30 lives in hand

Treasure Hunt:
In a Single game collect 30 or more Bonus Crystals

Speek Freak:
Complete the first wave in 5 seconds

Marathon Man:
During a single game complete the first 60 waves

Navigator:
On Standard difficulty level or higher complete wave 20 without touching a mine or other obstacle

Smart-Ass:
On Standard difficulty level or higher have 30 Smart Bombs in hand