Lose your first ship.

Kill an enemy ship.

Let your fighters score the death blow on a large enemy ship.

Make contact with an alien species.

Cause an auto-accident in space.

Send in the demolitions specialist to destroy an enemy spacecraft.

Destroy a missile or fighter with the point defense laser.

Travel between star systems.

Use concentrated fire from certain munition types to pop a welded mount and send an enemy gun flying off into space.