It's kind of a nebulous definition, but typically they're games in which you have a variety of options and systems to complete objectives. So things like Deus Ex where you can stealth, fight or hack your way through the plot. Usually the games will have a robust amount of physics or interaction with various objects so there's always a variety of things to do in a level.
It's kind of a nebulous definition, but typically they're games in which you have a variety of options and systems to complete objectives. So things like Deus Ex where you can stealth, fight or hack your way through the plot. Usually the games will have a robust amount of physics or interaction with various objects so there's always a variety of things to do in a level.