For versioned game files like Against.the.Storm.v0.41.3r.rar , extraction passwords are often provided at the original download source, such as a forum or a direct download site. If you do not have the password, you can try these common steps:
Note that older versions (v0.41.3r is a legacy early-access build) can sometimes be accessed officially via the Betas tab in Steam properties if you own the game. Against.the.Storm.v0.41.3r.rar
If "piece" refers to a missing volume (e.g., .part2.rar ), you must download all numbered parts into the same folder before extracting the first one. For versioned game files like Against