Onslaught 2.2 Tower Defense: Build a defense for Area 51 against a never-ending force of bad guys. Earn cash for each kill and upgrade your defenses.
These aren't just great web browser games, they are evil addictive time wasters that will make hours feel like minutes.
It's fun being a cheater. In this version of Onslaught 2, you have unlimited money and can build whatever defenses that you want.