Cartonfall: Fortress allows you to build your own cardboard fort. Gather resources, craft weapons, set traps, upgrade your base and defend it against hordes of enemies.
https://store.steampowered.com/app/1108390/Cartonfall_Fortress/
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Cartonfall spin-off, "Cartonfall: Fortress" is coming
Source: Steam Community (opens in a new tab)