You've played Hide and Go Seek. Really, that's for amateurs. When you're ready to play big time, try "hide and go EEK!"
This game was introduced to me by my friend Krista. Her family swears by its awesomeness. My family ... agrees!
How to play:
Same rules as hide and go seek EXCEPT you don't want to hide from the searching person, you want to scare them (and make them go EEK!) So get behind that closet door and where your seeker turns his/her back, jump out and yell EEK! Bonus happy points if you get them to jump!