The Game Boy Advance version is different from the other three versions insofar as it is more RPG based, and is played from an isometric three-quarter top-down view.[16] Gameplay focuses on turn-based combat, and at various points, all nine members of the fellowship (Frodo, Sam, Pippin, Merry, Aragorn, Gandalf, Legolas, Gimli and Boromir) are controllable, each with their own strengths, weaknesses and growth charts.[17] During combat, the player has the choice to fully control each member of their active party (up to four characters), or instead, control only the main player character, and have the other three controlled by the AI.[18]
Originally, WXP planned for The Fellowship to be an RPG, but they soon came to feel this might alienate potential players, and as they wanted to attract as many people as possible to the title, including people who had never read the books, they decided to develop the game as a third-person action-adventure instead. At the time, Frodo was the only controllable character, with the other members of the fellowship featuring as NPCs, although the player was to have the choice as to which character(s) to fight alongside at each point in the game.[19] The developers were also working closely with Tolkien Enterprises to ensure any action sequences or enemies that moved beyond the immediate events of the novel kept with the general tone of the narrative and were true to the spirit of Tolkien's legendarium.[19]
In February 2002, Vivendi Universal announced the Xbox version of the game would now feature three playable characters; Frodo, Aragorn and Gandalf, as well as multiple NPC allies and twenty-eight types of enemy. They also announced the release date had been pushed back to late 2002.[26] Also in February, Vivendi revealed more about the GBA Lord of the Rings, Part I, explaining it would feature turn-based combat, and all nine members of the fellowship would be controllable at some point.[17] During combat, the player would have the choice to fully control each member of their party, or instead, control only the main player character, and have their allies controlled by the AI.[18]
Every member of the fellowship took an oath to destroy the ring. But Boromir was easily corrupted by the power the ring guaranteed its owner. When he could no longer resist the ring, Boromir attempted to snag it from Frodo.