It is described as a monster fantasy slugathon and this description is accurate. The basic idea of the game is that each is represented on the board by a Titan. The Titan circles the board starting with a set of the lowest ranking creatures in the game and builds up his forces by recruiting more powerful creatures with the goal of elimating his fellow titans. What makes the game truly a classic is a couple of things. One, the board and the movement on the board is very unique.
Several paths intertwine in a very complex yet amazingly simple fashion.
Also the individual battle boards - an enlarged map of the each or the terrain types lead to some very interesting tactical decisions and battles as each creature has home terrains that will serve it better or worse in battle. Finally, the recruiting structure and choices offer a wide range of strategy options that stirs much debate with gamers on which creatures and recruiting paths work best. While this game well deserves 5 stars, it has its flaws. For one it can be a terribly long game. The individual battles can take a long time to complete leaving players who aren't in the battle to twiddle their thumbs.