In Onslaught, players are sent on a mission to find the reason contact with a distant research colony was lost. Upon arrival, they find themselves attacked by an overwhelming horde of giant bugs. Players use the Nunchuk and Wii Remote to aim, shoot, reload and toss grenades at the creatures in order to survive. As the bugs get bigger, so do the weapons. Jump into fighting vehicles when the situation arises and send the insects crawling back to their holes. With online capabilities for four person co-op, players can also link up and play with friends to battle the bugs together, without fear of friendly fire.