Beat level 1 and find the time machine to get to the past (normal or higher difficulty)

Beat level 2 and find Sarah Connor in Tech Noar bar (normal or higher difficulty)

Beat level 3 and find Sarah Connor once again in police station (normal or higher difficulty)

Beat the game by killing Terminator in the factory (normal or higher difficulty)

Listen to Arnold's voice in the end

Find a machine gun in the first level

Destroy all types of Skynet vehicles without dying (normal or higher difficulty)

Infiltrate a Skynet facility without taking damage (get down the first ladder)

Beat level 1 without a gun (normal or higher difficulty)

Finish level 1 with at least 10 seconds remaining (on normal difficulty or higher)

Don't press left in the first section of level 2

Don't get damaged in Tech Noar bar

Save Sarah in the police station with at least half of your health intact

Beat level 3 police station without restoring your health by taking any heals

Beat level 4 without firing any shots

Beat the game on very hard difficulty

Beat the game in 8 minutes 30 seconds or less