I think they key thing about the DOOM economy in Colossus of Atlantis, is that I have absolutely no idea what will happen when the game is actually played. This is equal parts exciting and terrifying.
Player actions in the game will increase the DOOM score. If the total DOOM score from all player actions hits a secret and predetermined point, the game ends with Atlantis sinking beneath the waves. The team with the lowest DOOM score wins a moral victory. Up to five players can assure personal survival through the cataclysm if “The Ark” Great Wonder has been built. A couple of the other wonders can influence the Atlantis DOOM score, halting its increase for a turn, a one off reduction in score, or allowing House scores to be reduced through sacrifice (which does not change whether Atlantis sinks, but can boost your chance of a Moral victory).
House and Atlantis DOOM scores are public information.
DOOM is a collective action problem inspired by the Prisoner’s Dilemma. Actions that increase DOOM have the potential to benefit the player whose action has triggered the DOOM increase. If your House nobly eschews the use of actions that increase DOOM, you may well save Atlantis, but your rivals who do increase DOOM may outperform you in the game.
DOOM tokens are also a negative feedback loop. They are a way of giving a boost to a player who has not done well earlier in the game, by giving them an option to catch up in effective game actions. Negative feedback acts to stabilize and prolong the game (See chapter 18 games as Cybernetic Systems in Rules of Play by Salen and Zimmerman MIT Press 2004).
Getting into the gritty detail, DOOM is increased:
- by the number rolled on a DOOM die (a d13)
- by the cost of each Sorcery card purchased by a player
- by the value of any Governance cards that DOOM is used to power up for City options
- by the value of any Governance cards used to activate Sorcery cards
- for roleplaying reasons (if Atlantis falls into anarchy, or the players are misbehaving)
Each map table will probably have at least one DOOM die rolled on it each game turn. So if we have five map tables and ten game turns, then that will make the Atlantis DOOM score increase by roughly 380. But a player with a DOOM die involved in multiple conflicts might roll the DOOM die four times in one turn. The DOOM ray technology upgrade also allows more DOOM dice to be rolled. So perhaps the upper range of DOOM from normal combat activities is closer to 1,000.
There are 18 sorcery cards. The cost to buy a complete set is 171 DOOM tokens. So if we have seven factions and all the cards are purchased, that is 1,197 DOOM. That is a large investment of DOOM tokens, when most teams will get perhaps 5-10 tokens a turn between all their players.
The cost of Governance cards used to power up cities and fuel sorcery card use is hard predict. The cards have a value range of 1-10, with an average of around 6.5. Higher value cards have usually (but not always) stronger effects. The limit here is going to be the number of DOOM tokens that can be used as fuel.
You get one DOOM token per conflict you lose, and each time you leave a Council meeting without any rewards. Player choice can see rewards distributed evenly, or hoarded by a few. So social inequality increases the chances of Atlantis sinking – I am okay with that as a design feature. The number of conflicts each turn is variable. Again player choice can lead to conflict free map tables. Or there could be a lot of eris on a table, and a player could get anywhere from 1-4 DOOM tokens.
Finger in air time, I expect most players to use DOOM tokens at least some of the time. The temptation to use DOOM will always be there. Maybe it will be 1,000 points of DOOM over the course of the game.
So, if I pick a secret DOOM threshold of 3,000, then its quite likely that Atlantis will sink. If the threshold is 2,000 it will probably sink quite early. If the DOOM threshold is 4,000 or more, then the chance of Atlantis sinking goes down.
So Sorcery cards are equivalent to nuclear weapons. You want some to act as a deterrent force against other players, but you may not actually want to use them in play. Given human emotions, once one House starts using Sorcery, the other factions may respond in kind. Another possibility is the kind of player who likes smashing sandcastles other players build, deliberately maximizing their DOOM generation (social mechanisms in the game might be able to deal with that – its up to the players to spot it happening and do something about it). A House that feels they are losing badly after a series of betrayals may also feel justified in dragging Atlantis down with them.
In my next post on The Colossus of Atlantis I will address aspects of emergent play in the game.