I really need a camera for under $600. It needs to be 1080p or higher, with 18mp. Also, 120 or more fps. The gopro isn't an op

[Nathan_26]

Help finding an HD camera

 

[basroil]

1) Why do you need 18MP?
2) Why do you need 120fps?
3) Why do you need a camera?
4) What size camera is needed?

Without those here are recommendations that fit some of your requirements:
http://www.bhphotovideo.com/c/product/1078007-REG/gopro_chdhy_401_hero4_silver_edition_adventure.html
http://www.bhphotovideo.com/c/product/1109327-REG/sony_as200v.html
http://www.bhphotovideo.com/c/product/1159879-REG/sony_dsc_rx100_mark_4_digital.html