To open a legitimate .rar file, you will need extraction software like 7-Zip or WinRAR . Other Possible Meanings

As a roguelite, you will likely die often. Use credits earned during runs to buy permanent upgrades for your character’s abilities, making future attempts easier.

The game features 2D physics-based movement. You can find it on Steam, Xbox, and Nintendo Switch . Handling "Operation.Zeta.rar" Files

Files ending in .rar from unofficial sources often contain malware or "cracked" software that can harm your computer. If you did not download this from an official storefront like Steam, it is highly recommended to scan it with VirusTotal before opening.

It was the name of a 1969 military parachute operation in Mozambique. Operation Zeta Review | TheXboxHub