The metroid_online.zip file you have requested: Maps Levels Missions / CE Maps / M to N Titles / Metroid Online v1 - 21.31mb is not available. Perhaps try browsing all files for the game Halo: Combat Evolved and upload any files you want to share or are missing. This is the only information we could locate:
Metroid Online Tallon IV Overworld Release Candidate 1Modeled by: Sc00byTextured by: LightningAll-around help: Teh LagScripting and Mod Assistance: KirbyOriginal FP Cannon Model: Wave of LagOriginal FP HUD Model: JahrainSamus Model: This is the first 2 maps of the Metroid Online stuff. It's really really good and contains New Weapons, new maps, and a Samus model only available to this map.