(adsbygoogle = window.adsbygoogle || []).push({}); I was wondering if the trophy hacks work for trophies that require multiplayer

Depends on the game mate . But most game saves will require you to do the online trophies .

SFxTK doesn't need you to go online.

As Camacheiro stated it all depends on the game. If the trophies are stored on the servers then they will not unlock eg. Fifa or more directly EA Games. However some online trophies are stored on the game save eg F1 2010, F1 2011, using Xploder these online trophies can easily be achieved.