Now If I understand right, isn't 3d when it comes out of the screen, you have those silly glasses on? Isn't all movies and games 2d?
There is no 3D TV/monitor I know of right now. The screen's right now are 2D.
A simulated 2D engine game will have the game in 2 dimensions. When characters turn, the characters will basically flip directions. It won't look like their body actually rotated and turned, actually -- unless they make those 2D animations. Arcanum would be a game of a full 2D Engine.
Some games use a 2D/3D system -- like many adventures. Here, the world is 2D, but the character models and textures are in 3D. When characters turn, you can see them fully rotate when they turn. It's very fluid-looking. For example, Planescape: Torment uses this.
Then there's 3D Engines. These can let the camera rotate all around and about. Characters here are also 3D, and they rotate around when they turn and move. A good example of a good 3D Engien would be NWN.
So, if you play a game that is simulated in 3D like say Gothic or NWN, you're playing a simulated 3D game on a 2D screen. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />