The easiest mechanic to point out is movement, and the synchronization of movement. At every step in the game, I'm moving along what would traditionally be gam

The easiest mechanic to point out is movement, and the synchronization of movement. At every step in the game, I'm moving along what would traditionally be game tiles, in a given orientation at a given velocity. While the 'world' is rendered around me on my PC, the movement and orientation changes all have to be upstreamed to the server and calculated for normalcy (to detect speed hacks, cheats, mountain climbing, etc).