The v1.01 update for Earth Defense Force: Iron Rain was primarily a Day 1/Early-access patch designed to improve stability and address initial launch bugs.
It sounds like you are looking for information or a breakdown regarding the release. This specific string typically refers to a scene release of a software update for the PC version of the game. Update v1.01 Overview EARTH.DEFENSE.FORCE.IRON.RAIN.Update.v1.01-CODE...
52 missions featuring the EDF fighting the "Aggressors." The v1
Includes both co-op play and a competitive "Mercenary" mode where teams compete to collect energy gems. EARTH.DEFENSE.FORCE.IRON.RAIN.Update.v1.01-CODE...