The Best Game Expansions Make You Rethink the Game

Much of the joy in playing games comes from climbing the heuristic tree. We encounter a new game and don't know what works, so we try different tactics and see better performance over time. Once we exhaust the low-hanging fruit, improvement slows, and the game starts to feel stale. Expansions can extend the life of the game, but it's not enough to just add content. An effective expansion needs to give players new challenges that their old heuristics do not already solve.

Factorio: Space Age is an expansion that succeeds by introducing five new sub-games, each with constraints that force you to develop new heuristics. The base game strands you on an alien planet and asks you to create a rocket to escape. Over the game, you learn to set up efficient logistics, organize supply chains, and scale processes. Space Age adds four new alien worlds to explore, as well as outer space itself. Each environment breaks a core assumption. In the base game, you can "bus" resources on a set of long conveyor belts and branch out, but resources on Gleba spoil, so resource buses don't work. You normally start with simple ores that you combine into more advanced resources, but on Fulgora, you start with end products and recycle them into simpler components. Land on a planet is plentiful, but in outer space, you must build compact factories due to the cost of shipping space platforms into orbit. Each location feels like playing the game anew because your prior heuristics no longer apply.

In contrast, Catan: Seafarers is a mediocre expansion that adds content without changing constraints. It introduces islands, the ability to build ships, a "pirate" which functions as a waterborne robber, and gold tiles which produce wild resources. Unfortunately, a player's preexisting heuristics map perfectly onto these new mechanics. Ships work almost exactly like roads. The pirate works mostly the same way as the robber. Gold tiles are wildcards, making them easy to integrate into existing strategies. The game has scenarios that help a little, but overall, it fails to change how the game is played. Because the new content does not change how players approach the game, experienced players adapt almost immediately.

An expansion lets players reexperience the sense of possibilities they felt when they first encountered a game. It succeeds when it forces them to rebuild their understanding of the system, but it fails when the same strategies still work.