Flash Game Hints:
Submitted by: RM
Your base unit will hover in the sky, the enemy unit is on
the ground below. Build flying units and make use of the
upgrades available in Sky Invasion.
Unlock Secret Striker:
Submitted by: tyler covey
By creating 100 thunderbolts will unlock the secret striker.
Submitted by: Mr.C
Create 10 gun towers to unlock emp tower, creat 100 thunder bolts for
secret stiker, and complete level 8 to unlock aircraft carrier. There
is also one more i don't have. 3 unlocks...
Submitted by: clkc
you need to destroy 5 corona towers to get the plasma tower.
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