LEGO Star Wars has a few different game modes in which you can play: Story mode, Freeplay mode, and Challenge mode.
When you first start the game, you must play in Story mode. This mode follows the plot of the original Star Wars trilogy.
The characters that were in certain scenes in the movies are found in corresponding scenes in the game. You cannot deviate from that in Story mode.
For example, in Episode IV A New Hope, Luke Skywalker, Han Solo, and Chewbacca went to the holding cells on the Death Star to find Princess Leia, so in the game’s Story mode, you have to use those same characters to find her.
After you have completed a mission through Story mode, you may go back and play through it again in Freeplay mode. In this mode, you can return to any mission, and have the option of playing as any character from your character inventory.
After you make your choice, the game randomly chooses a cast of other characters from your inventory. This cast of characters is always available for your use throughout the mission.
You can switch to any of them at any time. The game chooses characters with the different abilities you might need to get to all the areas of a mission. Playing in Freeplay mode lets you use characters you weren’t able to use in Story mode.
You can change the scenes from the movie and can actually make Boba Fett fight himself during Episode V.
You can also play in Challenge mode where there are 10 special canisters hidden throughout a level for you to find. You have to find every canister in a level in less than 10 minutes to succeed.