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A game that has some of or all of the mechanics: Limited interaction or the ability to be played without interaction, rapid growth - often exponential, prestige mechanic(s), An end goal/mission or a general goal of getting a higher amount of currency, and a system of buying and upgrading buildings, units, or similar.

Games where you have to manage resources in order to complete objectives. 

Games where the primary goal is keeping the player character alive under harsh circumstances such as dwindling resources or a hostile environment.