Sky Force Free - Sky Force is basically a mission against enemy riders .Direct the fighter plane to hit the enemy raiders around each level while collecting powers ups like and avoiding the danger power. You can direct your player towards right by (6), left by (4), up by (2), down by (8) keys and for fire press OK or (5) key. There are five levels in this game. Try to collect extra power ups to increase your chance to win. In levels 5, enemy raiders will come down 1 step after every time gap. Don't let reach the enemy raiders to bottom of Galaxy Screen. Try to clear all enemy raiders in limited time frame.