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Cities: Skylines

Microtransactions in Cities: Skylines are summarized as...

This game has a very large amount of DLC. Most of them are Radio stations, which unlock extra music, and are very optional. Others are larger content packs, which altogether are very pricey. All DLC together will cost well over 200 USD.

👎
Contains an unreasonably large amount of optional DLC, costing an extraordinarily high amount in total.
Contains no direct in-game microtransactions, but does contain a large amount of optional paid DLC, some of which might be of questionable value.
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Includes all future updates, but there are optional DLC you can purchase.
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Extensive official mod support.