Nobody pays attention to a meteorite fall in the jungle and a few years later, military satellites discovered strange activity in the jungle. Your government sends elite commandos to find out what is going on and to try and clear up the situation..
The triad leader hired assassin who poisoned the emperor. The emperor is dying and the only cure, the six magic reagents, are protected by deadly assassins. Good luck!
You were kidnapped by terrorists and brought to a castle far away from the civilization. They force you to construct a nuclear bomb for their next big attack so it's your job to escape the castle.
You are a brave caveman who lives alone in the mountain with active volcano on the island. Deflect stones spewing off from the volcanic eruption with your stick or they will eventually destroy your island.
Shoot, upgrade, conquer enemies, defeat bosses, acquire achievements, collect gems, all in an attempt to save yourself and your gun from the clutches of the evil Professor.