Complete the 1st stage in Hard mode

Rescue all prisoners at stage 1

Destroy all alien eggs at stage 1

Fix every fuse or junction boxes at stage 1

Repair the pipes at stage 1

Complete the 2nd stage in Hard mode

Fix the Generator at stage 2

Repair the pipes at stage 2

Destroy all alien eggs at stage 2

Rescue all prisoners at stage 2

Fix every fuse or junction boxes at stage 2

Complete the 3rd stage in Hard mode

Defeat every mother alien at stage 3

Rescue all prisoners at stage 3

Repair the pipes at stage 3

Fix every fuse or junction boxes at stage 3

Destroy all alien eggs at stage 3

Complete the 4th stage in Hard mode

Fix every fuse or junction boxes at stage 4

Rescue all prisoners at stage 4

Fix the Generator at stage 4

Repair the pipes at stage 4

Destroy all alien eggs at stage 4

Complete the 5th stage in Hard mode

Rescue all prisoners at stage 5

Fix every fuse or junction boxes at stage 5

Defeat every mother alien at stage 5

Destroy all alien eggs at stage 5

Fix the Generator at stage 5

Repair the pipes at stage 5

Complete the 6th stage in Hard mode

Fix every fuse or junction boxes at stage 6

Rescue all prisoners at stage 6

Destroy all alien eggs at stage 6

Fix the Generator at stage 6

Defeat every mother alien at stage 6

Complete the 1st stage

Complete the 2nd stage

Complete the 3rd stage

Complete the 4th stage

Complete the 5th stage

Finish the game