Epic War Age (EWA) - Adapted Mod Collection

Do creature alt-upgrades work in multiplayer? Or do you need to create a map using RTMG templates? No matter how many times we try to play online, even in Fortress, only standard upgrades are available. What could be the problem?

Are you sure you know how Fortress works? First, you upgrade to one tier, and then you get the option to upgrade either to a standard alternative or to a new one.

If you don't get the option to upgrade to a new alternative, it's possible that your map isn't patched to EWA.