Here is the full list of all 13 DELTAZEAL achievements.
Wide shot is the best!
Submarines everywhere!
Tanks ! Tanks !! Tanks !!!
DELTAZEAL All Clear
DELTAZEAL 1 Credit Clear
Nothing escapes homing!
Great laser beam!
Black Hole bullets, what's to say.
Here come the RAPID series!
Incoming, outgoing, trains in every direction!
That big guy gives you 10 times more points!
The fun has just started!
Playing once in a while allows you to make new discoveries.