I actually had a couple of dreams. The first would make an awesome videogame. There were four of us with grappling hooks and crazy jumping abilities. We fight each other to get to certain power nodes, which give us health and abilities. It was more real than a videogame, though.
The second dream was me playing a chess-checkers hybrid. There are two colors: blue and red. Squares on the board are captured in battle, and the pieces can only move on squares of their color. It makes for an interesting dynamic. There are also resources, which can make it easier or harder to capture certain squares.