The Force Unleashed does not get the proper credit it's due.
The Force Unleashed (TFU) is a great Star Wars game. Acting as a filler between episodes III and IV it describes the story of Darth Vader's secret apprentice, dubbed "Starkiller". With George Lucas giving details to the team about what he wanted and didn't want, it tells a great story, which surprisingly for fillers, is interesting and doesn't seem too far fetched. The visuals are all great, and the levels are designed famously. Some colorful and immersive, others dreary but still not dull. The costumes are also greatly detailed and the fact that you can change them whenever you like is something I enjoy in games, because in my opinion, you can never have too many costumes, and changing the look of your character is sometimes just as important as getting the combat or story right. Customization is always good.
The combat is always fun, either throwing your enemies through the air only to hit one of their allies, or by zapping a few of them, or just by taking them out the old fashioned way with a few swipes of your lightsaber. Your lightsaber, by the way, can also be changed by getting different crystals you find hidden throughout the game.
Havok engine helps run the physics, which everytime I see the Havok symbol I get excited, because they do great work in any game, and this one is no exception.
All-in-all I believe this game is thoroughly underrated, and if you're a Star Wars fan this is a definite, even if you're not, it's a good rental. The only problem being that it's too short, and that the combat can be a bit repetitive because there's only so many ways to kill your enemies.