Progression is a vital component of any video game, but that's especially true for the strategy genre. Whether it's an RTS, a 4X game, or a city-builder, players need to feel a gradual sense of progression that incentivizes them to keep playing. In many strategy games, that sense of progression is presented as a technology tree, allowing the player to upgrade their abilities, improve their buildings, and unlock new units. Frostpunk 2 is one such game.