Use the chopper to~rescue soldiers~from behind enemy~line.You can rescue~soldiers by lowering~down a rope/ladder~and any soldiers~nearby will climb.~At the same time,~you need to avoid~enemy soliders.~Controls:~Hover the chopper~Up /Down/Left/Right~or 2/8/4/6.~Shoot enemy~aircraft -5~Shoot enemies~on the ground -7.~Use rope ladder to~pick up soldiers-9.~