They are never as good as the original.
Destroy 2 enemies with a single shot 25 times.
Destroy 3 enemies with a single shot 10 times.
Destroy 4 enemies with a single shot 3 times.
Destroy 5 or more enemies with a single shot.
Return to sender.
Use the walls to your advantage.
History is bound to repeat itself.
Don't touch the ground for 60 seconds in a single life.
Jump and Shoot 5000 times.
Don't let them cross the line!
Score multiple points back to back in the Infiltration game mode 10 times.
There is always a master and an apprentice.