Java Games: Most Java Games Require Downloads
Shockwave Games: The Shockwave Genre Is Mostly Dead, And Most Of The Games Dont Work.
Unity 3D Games: Unity 3D Games Are Extremely Glitchy, Laggy, And Seem Impossible To Play (For Some People, At Least)
Online Games: Laws
Multiplayer Or MMO Games: Same As Online Games...
Games With Premium Items That Can Be Bought With Money: That Can Cause The Creator's To Lose HUGE Amounts Of Money, Then They Could Just Sue APH.
Full Version Games: Same As Premium Item Games...
Browser Games: I Dont Really Know...
Hope This Helped You!