okay, so i was doing the house always wins mission and as told went to ceasers legion, but i had to kill him and all of his followers to aquire the chip. once they were all dead and i had the chip, i brought it back to house and gave him the chip. then i was told to use it to open a bunker at the fort. but when i got to the fort i didnt have the chip and when i returned to house he wont give it to me. so i killed house in hopes of looting the chip off of him. now theres no chip to be found anywhere and i need it to complete the main story mode. ive tried everything. and suggestions?

Are you playing on a PC? If so you can http://fallout.wikia.com/wiki/The_House_Always_Wins#Bugs.

Well the Go with NCR

Check the chests near the arrival point,where you spawn upon arriving via boat, you usually get stripped of your weapons and they hold them in one of those chests one of the guards has a key WARNING legion turn hostile if you open the chest so if you wanna start a fight open it up.

im on the ps3. but i have boone the follower and he started to kill the legion and i became vilified. so i had to kill all the legion and never got stripped of weapons. so basically i have no chip and cant complete the mission because it is no where to be found. ive checked EVERYWHERE