While I have yet to see the film release of
Ratatouille, the game does seem like it is loosely based on the movie. Your main controllable character, Remy (the Rat), gets caught putting items into a soup that ends up tasting great. So the main human character, Linguini, makes a deal with Remy to obtain help becoming a chef. However, as far as the gameplay goes for
Ratatouille, you'll spend most of your time trying to collect 100 stars and other miscellaneous objects in typical platforming fashion, all as a side to the main goal of completing missions handed down to you from the other rats.
Ratatouille's single-player gameplay is quite linear in nature when it comes to the paths that you'll take for each individual mission. With that said, you are able to attack different missions at almost any time with the ability to walk around and "enter" into the different areas where missions take place. While the missions are certainly different from each other in specifics, you will likely feel déjà vu many times over from the generally similar objectives. However, it should be said that the game ends up playing out quite long, and considering that ability to go back and play if you missed side missions, the replay value of Ratatouille is quite good.
Increasing the replayability further, as you work your way through the game, you'll be earning points toward buying, and unlocking, different game modes, movies, and a lot of other things. Within these unlockables are single-player and multiplayer mini-games, adding even more to the value.