Combat takes place in designated locations and situations.
As might be expected from this and the stated emphasis on story, Odium appears to be fairly linear. There are, however, a number of sub-quests, although Adrian Chmielarz suggests not skipping very many. A number of these quests are adventure-like in nature, involving finding passcards, explosives and other items to open doors, gates and other barriers. In terms of technology, Odium combines 2D rendered backgrounds and 3D polygonal characters. The former are very well drawn, contributing very nicely to the overall game atmosphere.