Conquest of Nerath pits four realms against one another: an undead empire, a goblin/orc empire, an elf empire and a human league. You can play with two to four players. In the two-player game, each player plays an alliance, controlling each of two realms separately, but using them to assist each other. With three players, one player plays the elf/human alliance against the other two. A four player game can use the alliances or play it out as a four-way free-for-all of shifting allegiances and shady deals.
Play is pretty straightforward - you're goal is to gain victory points by conquering territories. Territory control also gives you more gold each turn, which you spend to purchase units. There's a nice range of units, from basic foot soldiers to heroes, wizards, monsters, warships and even elementals and dragons. The units have varying costs and different sets of special abilities. Wizards, for instance, have first strike, so they deal any damage before opposing units can hit back. Monsters have a Blitzkrieg ability (called Run Amok) that lets them conquer an unprotected enemy territory after you've won a battle. All attacks hit on a roll of 6 or higher, but different units roll different dice. Foot soldiers have a tough time hitting on their D6s, while monsters hit well with their D12s. Dragons and castles roll D20s.