Our upgrade games collection features titles with progressive difficulty where advanced levels will require decent equipment along with extraordinary gaming skills. Got stuck? Collect some money, purchase a better gun, improve your defensive shields, buy engine with higher performance, or implement latest version of enhanced body armor, and try it again. Unlimited options of upgrading provide your with hours and hours of new content and fresh gameplay! Invent, craft, build, purchase, and upgrade it to the next, more powerful, level!