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