on survival mode: just hold down the right arrow
key and space bar.. you will get all the
achievements in 6 min
KEEP YOUR SPACE DOWN!!
It's all about speed and ammunition. Upgrade
every time you can.
Cicle around the planet while pushing the space
Do the right arrow like supergirls said. It is the
best way to unlock all achivements.
In the survival mode, just hold SPACE and LEFT KEY
till the end.
You will unlock Time
trial and Silent killer achivements.