| Achievement | How to unlock
|
|---|
| 300 Human Survivors | Completed Stage with at least 300 Human Survivors.
|
| 5 Lives | The proud owner of five lives.. nice.
|
| Completed SkillShot | Finished all stages in Skill Shot Mode.
|
| First Blood | Smashed an alien.
|
| First Boss | Destroyed your first alien mothership.
|
| Survived 120 Seconds | Two whole minutes in Survival Mode.
|
| Survived 240 Seconds | Four whole minutes in Survival Mode.
|
| Survived 300 Seconds | Five whole killer minutes in Survival Mode.
|
| Zone 1 | Defending Old Blighty.
|
| Zone 2 | Defending Moscow.
|
| Zone 3 | Defending Tokyo.
|
| Zone 4 | Defending Toronto.
|
| Zone 5 | Defending Paris.
|
| Zone 6 | Defending Paris.
|
| Zone 7 | Defending New York.
|