Because these files are parts of a single larger archive, you cannot "use" Part 2 on its own. To extract and play the game, you need to follow these standard steps for multi-part RAR files: How to use Part 2
: Unlike the main EDF series, Iron Rain was developed by Yuke's and features a more "westernized" aesthetic with character customization and a "Prowl Rider" class that lets you ride giant insects. EARTH.DEFENSE.FORCE.IRON.RAIN-CODEX.part2.rar
: The game features 52 missions in its main campaign. Because these files are parts of a single
: Ensure you have every required part (e.g., Part 1, Part 2, and so on) in the same folder on your computer. : Ensure you have every required part (e
: If you are just starting, prioritize upgrading your Energy Core to improve your mobility and "Overdrive" duration, which is crucial for survival in later missions.
The filename you provided refers to the second part of a multi-part compressed archive for the game , likely from a pirated distribution by the group CODEX.