Environmental TTRPGs put landscape, scarcity, ecology, climate, or human impact into the loop of play. Start with Blue Planet: Recontact, Mouse Guard, The Wildsea, and Werewolf: The Apocalypse as comparison points, then move down the list based on the kind of theme your group actually wants.
When comparing environmental games, look at survival pressure, exploration, community stakes, whether nature is threat or relationship, and how consequences accumulate over time. Those details matter more than the tag itself, because two games can share a category while asking completely different things from the GM and players.
Use the top picks as anchors rather than treating the page like a simple popularity ranking. The goal is to answer the practical table question: which game will produce the kind of first session, campaign rhythm, and player buy-in your group is likely to enjoy?
The theme needs procedures that make the environment push back; otherwise it fades into scenery.