The entire campaign and general graphic style is different. And obviously the game has moved to 3d. Despite this (:P), the graphics, not the best around, are still functional.
The economy functions the same as in Settlers 2, although the numbers have been tweaked (A Settlers 2 player will quickly notice). Also I got the feeling most maps have been set up radically different; at least my playstyle has changed a bit.
In the end, 10th Anniversary is a good choice if you want something new to go with the old Settlers 2 gameplay. There's nothing more, nothing's been added.
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