Survive the first day.

Survive the third day. [Medium/Hard Only]

Survive the first three days without using the Sentinel Saucer.

Survive the fifth day. [Medium/Hard Only]

Survive the fifth day. [Hard Only]

Survive the eighth day. [Medium/Hard Only]

Survive the eleventh day and "beat" the game. [Hard Only]

Score 1,000 points.

Score 5,000 points.

Score 10,000 points. [Medium/Hard Only]

Score 20,000 points. [Medium/Hard Only]

Score 20,000 points. [Hard Only]

Score 40,000 points. [Medium/Hard Only]

Score 60,000 points. [Medium/Hard Only]

Survive the eleventh day and "beat" the game.