Agora (1996)

The board is a wooden block in 3 layers of height.
The game pieces have a black and a white side.
Every player starts at one end of the board, and the goal of the game is to caption or convert the pieces of your opponent.
Tiles can be moved 1 place horizontal or vertical, and one level up, and there is no limitation if you go down.
This means that you can jump on tiles of your opponent if they are on the same height, or lower. In this way you convert tiles of your opponent to the your own color.
But there is more. When there is a stack of tiles you can chose to surrender: instead of being jumped on you can chose to place your own tile underneath a stack that is on a higher level. The tile is not flipped , and it keeps its own color. It is a prisoner of that stack. But if a stack holds a majority of prisoners, there is a revolution. The prisoners become free, and the top tile (and all other tiles of the stack) chance to the color of the prisoners.
The game ends if one of the players can make no more moves.

A winner of the 1995 Concours International de Créateurs de Jeux de Société.