I have a huge backlog of games i have yet played on PS3, PS4, X-Box 360 and Vita, alot of these i wait a while before i play them so that when i do i have almost all the DLC.
In the past what i have done i created a second profile on my PS3, put the game in there then go back into my main account and download the DLC, once i'm done i go back into my second profile and test that the DLC has been installed, i do this because Hyperdimension Neptunia has a trophies you get for starting a new game before the DLC check and Disgaea 4 has one for watching the intro animation which i might not skip if i've been called elsewhere. ofcause not all the time i can test that the DLC has been installed just from starting a new game, the Atelier Twilight Games didn't have a notification.
I haven't done this with the 360 and it's not possible with the Vita, so i am wondering, do i need to have ran the game once in order to for the DLC to be installed? (ie. i buy a game overseas and while i wait for it to arrive i get all the DLC)
NOTE: i would like an answer which covers all the consoles that i have tagged incase if there are any differences between consoles like maybe the PS Vita needs the game to have ran once to install the DLC