The most basic tools you'll need to start making a hack/mod game are a scripting tool and a mapping tool. For scripting, where you can create your own events, I'd suggest XSE. For mapping, I'd suggest Advance Map. Both tools are available in the TOolbox Section.
Hey destinedjagold i just would like to know how you hacked some of your games, like what applications did you use? im just curious i want to make i hack of my own but i really dont know how if ever i would really appreciate it if you would help me like what are the requirements for creating the game? or as i've said earlier what applications you use (sorry if i said it again) it would really mean so much to me if you could help me. well that's all :D. Thanks for the games and have a Merry Christmas and a Happy Newyear :D