Run Anno 2205 OS win x32 bit.
The starting version of Anno 2205 can not be run on this system, as in Anno 2205 are constraints which check the system before you run, but you can change this to patch the game.
By stimovsky requirements for iron, it is clear that the game requires at least 4GB of RAM to run and play but it is possible even in two.
To remove these restrictions, fans made a patch that unlock the game and the game works fine on win x32 bit, even works on 2 GB RAM, but downloads very long.
Download: Anno 2205 for win x32 v.1.02
Installation: Install folder indicating Anno 2205