Introduce
Above the game is left has UPGRADES, when massacres
the certain quantity the enemy can increase family XP, then may
promote the related skill in UPGRADES, the skill comparison explained:
RELOAD: The filling ammunition time speeds up RAZOR
ROTORS: Increase flight speed and skill GUN AIMING: Runs
aiming increase adrenaline: Strengthens character''''s attack speed
stunting: Growth value cluster bomb: Increase bomb power
armor. : The armor increases spare planes: Increases
the spare equipment The game needs two people to coordinate to
play together, selects right side the picture 2 player button start,
it slights the law: P1:W, A, S, D
control migration,
G/ to place bomb, F/ 跟追 missile, P2: Mouse/machine gun fire,
above-below direction key
.