Modded amd Offline Games problem

i got a problem on playing games download outside playstore, for example a nba 2k14 modded as shohoku vs knb install apk and pasting obb, when i run games it suddenly back to home. any one clear my mind and tell me what should i do? im on pure nexus rom, when im on stock rom the problem the same.

tia

Sent from my Nexus 5 using XDA-Developers mobile app

from xda-developers http://ift.tt/24DdvnO
via IFTTT