Im using ip8.. after 1 hour of playing Mobile Legends.. just a little bit of slight heat.. some u might go unnoticed too..

Hmm.. im not very sure fren.. but i think its fine.. when u play games, it push all the hardware to function.. and worst if u are on data, its triple whammy.. and maybe some games will make the iPhone producing some heat.. i only have ML on my unit.. maybe can wait the rest of the forummers to give their input on other games..