PyCrypto
If you manage to find a legacy copy or key, the minimum requirements are very low by modern standards: Immune - Steam Community
Featured both PvP (Player vs. Player) and PvE (Player vs. Environment), though critics noted the AI could be quite difficult. Technical Requirements (PC) Immune: True Survival Download PC Game
Options included building forts or occupying existing houses to store loot and defend against attackers. If you manage to find a legacy copy
Included the ability to drive military vehicles and tame wild dogs to act as bodyguards. Immune: True Survival Download PC Game