The beginning of the ire, many portals, including on the third large island, you can walk, but until the beginning of the 4th chapter I recommend not to enter the Bakhnamar castle because I personally did not manage to get out of there, as well as with the Swamp area (where the village of Tir Gil) until he killed the demon Garadel
Two Worlds 2: Save Game (Game on Jade Master difficulty) Free Download
P.S. Passed by myself on Windows 7 x64 bit