Okay, remember cooperative games? Well, semi-co-op games work around that space. They have the basic setup of a cooperative game, but there’s something in the game, some player’s behaviour, that keeps it from being purely cooperative. Usually this means there’s a player who is secretly working against the actions of other players, but sometimes it can mean that there’s just the suspicion of such a thing.
There’s a really different affect to a semi-cooperative game. Semi-co-op games aren’t like ‘cooperative games, but,’ because suspicion tends to become a huge part of the game. It’s less about how to complete the cooperative challenge, and much more about how you can use your actions to either obscure your intentions, or to entice other players to take actions that would evoke their identity.
Semi co-op structures are really good at fighting quarterbacking (as described in the cooperative term). They’re also really good for representing a fairly robust, classical narrative – people work together, then there’s a sudden disruption where someone gets revealed to not be a part of the solution. There’s also just the fear of that. Sometimes players will avoid making optimal communication just because they might be dealing with a traitor in a game that might not have one active.
The other type of semi-co-op can be one with one player an open adversary to the other players. This opposition means you can give the game an oppositional force that has to make decisions, like a Dungeonmaster or Game Master role.
Another, third way to do semi-co-op is to have players form cooperative units. Imagine a game where two players work together on their own small project, at a time, then each of those projects compete to see what they can do.
The problems present in cooperative game design tend to be coded out of semi-co-op. With at least one player adding an element of confrontation, it becomes easier for difficulty to adjust to players’ behaviours. When a game’s opposition is primarily a hard-coded system (like a scenario, or cards, or combinations of those cards) it can make opposition feel a bit blunt and thoughtless. If a player is the one opposing you, they add a different feeling to that experience…
… buuuut then you have to basically make two games at once. Semi co-op games have to have design space set out for the oppositional player and this can often get out of hand. It’s part of the design load, where you need to create content for both forms of contribution.
Betrayal at the House on the Hill, Dead of Winter, the non-co-op expansions to Pandemic.