I am making a game. And in the game you can get different rewards for being a "gangster", like cars, watches etc. Is it legal (not infringing) to name the cars by name for example BMW, Bugatti, Ferrari etc. or not?
Assuming you are in the US, or US law applies, but I'm not a trademark lawyer, but I would suggest you look at what other companies have done, i.e. Rocktstar for GTA. Here they used similar car designs, and gave them similar names, but not the same <a href="http://www.gta4.net/vehicles/" rel="nofollow">http://www.gta4.net/vehicles/</a> In the long run this will save you having to prove that you are using them under the fair use guidelines <a href="http://en.wikipedia.org/wiki/Fair_use_(U.S._trademark_law)" rel="nofollow">http://en.wikipedia.org/wiki/Fair_use_(U.S._trademark_law)</a>