Insect Onslaught Game added at Ozov under categories Animal,Flash,Flower,Free,Gun,Online,Purchase Equipment Upgrades,Shooting on 2018-06-10 13:54:06. Insect Onslaught is a surprisingly entertaining game. It’s a shooter with a per level affair and an adequate upgrade system. Blast these waves of insects while destroying their eternally reproducing creators to win each level. It not just the weapons that get upgrades but also some other interesting things.