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Increasing number of games include progression trees in their core gameplay experience. They allow players to unlock attribute improvements, new equipment or new features. This design mechanism comes from RPGs and MMOs. It makes it possible for game designers to engage players with short to long term objectives. Such progression trees are very frequent in freemium games but they are also increasingly found in premium triple-A titles. Most of the time, they are based on a ” resource that players have to accumulate by playing the game. This resource can be experience points (XPs) that unlocks thresholds.

The common strategy to define those thresholds is to build a progressive curve. Players quickly level up during the early stages …read more