"Final Fantasy Tactics" was arguably the most responsible for bringing tactical RPGs to North America. Developed by former employees of Quest, the developer responsible for the "Ogre Battle" series, it combined many elements of the "Final Fantasy" series with "Tactics Ogre"-style gameplay. It also expanded on the isometric grid combat of "Tactics Ogre" by allowing players to freely rotate the camera around the battlefield rather than keeping the camera in a fixed position. The storyline of "Final Fantasy Tactics" was also more linear than its predecessor, in order to provide a deeper epic narrative. Thanks to Hiroyuki Ito, lead designer on the game, it also successfully implemented a modified job system, previously used in "Final Fantasy V", which allowed the player to change a unit's character class at any time during the game and learn new abilities from job points earned with each class. The game was acclaimed for both its highly tactical gameplay and its well-written storyline that touches on issues such as class, privilege, religion, and politics. The game's reputation led to other developers adding the word "Tactics" to their titles to indicate the tactical RPG genre. It was later ported to the PSP as "" and is still regarded as one of the greatest tactical RPGs of all time.