The version of Dark Quest 2 here can't be compleated currently. (2/28/2020) Towards the end of the campain the mission "Decent to Chaos" can't be finished. Picking up the (required) talisman piece doesn't end the mission, and their is no way to exit the level other than to flee and fail to compleat. Consisdering how long ago the game was released on steam that a bug like this should not be present it feals grievous that a buged copy is what was made available on GOG.
