The opencoop_20alpha.exe file you have requested: Modifications / Open Coop / OpenCoop Alpha v2.0 - 327.76mb is not available. Perhaps try browsing all files for the game Doom III: Resurrection of Evil and upload any files you want to share or are missing. This is the only information we could locate:
# Resurrection of Evil support - Long anticipated, now it's done. We mostly completed RoE support for this version. The generators are working and fully support multiple players. Every player can pick up batteries and drop it into another generator. OpenCoop is not compatible with Resurrection of Evil. See the other changes below.