The Duel Master series were a number of competitive two-player game books, by the same authors as the Way of the Tiger series. There was one for a wizard's duel, one for an arena battle, one for a slave being hunted for sport by a dragon-man (my favorite) and one about two nations going to war. And that last one's plot has a lot in common with Warbringer!, in that the first act is traveling to various other kingdoms looking for allies, and the second act is a mass combat minigame. And because both sides of the war have a player, it probably won't be such a deterministic mess enforced by grossly unfair game-over roadblocks.
So here's how this is going to work (if it is going to work). People will sign on to one team or the other, and each side will have its own thread (I'll use this one for mutual information like the rules and the setup). People who are on a team are on the honor system not to look at the opposition's thread until the match is over. It's a game, you're only cheating yourself, etc.
Okay, technically it's two books. Each player got one, and they're written using a system of WAIT commands to keep the players synched in time, and a system of recorded keywords to keep track of the dynamic game state. It's totally plausible that both players will attempt to enlist the same ally at the same time, or that one will try to ally with a kingdom that's already made up its mind, and those have their own varying resolutions.
The Ten Kingdoms
(Yes, it's set in the same world as the Way of the Tiger.)
On the magical world of Orb, beyond the Mountains of Undying Solitude, lie the lands known as the Ten Kingdoms. The people of the Ten Kingdoms are not as the people of the Manmarch, four of the kingdoms are not kingdoms of men at all, but of other, older races. The Old Gods are strong here, and the people are very superstitious.
The Kingdom of Monsalyar
The Kingdom of Monsalyar is perhaps the brightest jewel of all. Its rolling hills and pleasant valleys are among the safest and most charming of all Orb. It is said that you can tell a Monsaljan by his ready smile and the gaudiness of his costume. The fortune of the kingdom is founded on the many dyes which grow within its meadows and on the shores of its lakes. These are traded with powers as far-flung as Heartguard, Druath Glennan, and even the Island of the Goddess. It is a prosperous land, but its peace is soon to be shattered by war.
Monsalyar is the stereotypically pretty/good kingdom, Dorganath the stereotypically gloomy/bad kingdom.The Kingdom of Dorganath
The Kingdom of Dorganath is perhaps the most sinister of all. Its saw-toothed crags, its dark barren moors, and the dull grey stone of its castles and city walls are the most forbidding of all Orb. It is said that you can tell a Dorgoman by his stony countenance and the size of the lock on his purse. The power of the kingdom comes from the rich seams of metal in the hard grey rock which yields its treasures so grudgingly. The hardened Dorgomen trade these metals, iron, copper, and nickel, for the finer things of life in the colorful markets of Monsalyar. It is an enduring land, the oldest kingdom of men in the Land of Ten Kingdoms, but its peace is soon to be shattered by war.
The Oracle of the Axis
On the shores of the Sea of Passing above the Farewell Lighthouse lies the cave which harbours one of the three great Oracles of Orb, the Oracle of the Axis at World's End. The people of the Ten Kingdoms consult the oracle over everything from the planting of crops to the waging of war. The sybil who is the mouthpiece of the Axis customarily shrouds her predictions in riddles and in phrases which may be interpreted in more than one way. But now for the first time in living memory the sybil has given a prophecy whose meaning cannot be mistaken.
For the whole of the month of Demondim, all who have visited the cave above the Farewell Lighthouse have received the same answer, no matter what their question. 'At the time of the Allmother's Splendour, when the fruit is ripe and the birds are in full song, will the Land of Ten Kingdoms become the Land of Nine Kingdoms. Not through marriage alliance nor the meeting of minds will this change occur, but through bloody war, looting, pillage and destruction. The jewel will sparkle more brightly or be forever dulled.
They are officially fighting 'for no sufficient reason.' Superb.The Storm Clouds Gather
The kingdom of Monsalyar has long been known as the jewel of the Ten Kingdoms, and of its neighbours, the hardened jealous Dorgomen so often snubbed in the Monsaljan marketplaces are generally thought to be the ones who will declare war. The Dorgomen have found themselves mistrusted because of the prophecy and so they prepare for war. The Monsaljans for their part must destroy another country or be themselves destroyed. The sages of the land agree that war is inevitable, some blame the oracle, others say that the oracle only foretells what must come to pass and blame the Dorgomen. One thing is certain: in the month of Allmother's Splendour, the rulers of both countries must be ready to go to war.
Anyway, let's see if there's enough interest to get this thing off the ground.
Team Monsalyar
Dr_Noface
Korgan0
Team Dorganath
Corsair114
Darth Rabbitt
Starmaker