I'm not a lawyer, so I could be wrong, but I've had a little legal training and this is my 2 pence worth...
A game title is not copyright. It may however be a trademark if it is unique enough to be so and is in use. Example 'Falling Blocks' is not unique but 'Tetris' is a unique brand name that is still in use.
You should avoid any confusion where your game could be confused with another title as it could be deemed as 'passing off' (trying to trick people that your game is the genuine offical one)
Sometimes similar titles are unavoidable like 'Dracular' so to differentiate their product from any pervious one they may add the authors name such as Bram Stokers Dracular or Tom Clancies Rainbow Six.
Also copyrights are lost 50-100 years (varies from country to country) after an authors death so you shouldn't have any legal issues with making your own version of Dracular, Hercules or Frankintein even if the storyline faithfully follows the original text.
Hope that helps
DinoHunter (still no nVidia compo voucher!), CPU/GPU Benchmark, DarkFish Encryption DLL, War MMOG (WIP), 3D Model Viewer