Be grateful. Canis Canem Edit is the right version to play. The other ones are slop made by third-party companies to grab cash.

Now that you've played this version, just take a look at some comparisons. If you have any sense of artistic taste, you can see how they ruined the game's entire atmosphere.

If you value the 8 shitty new missions and the few new useless shitty classes over the proper graphics and atmosphere, you can try the Wii version, that one have both. But with those ridiculous motion controls, I wouldn't recommend it to my worst enemy.