currently, while xenonauts has steam cloud, saved to not transport accross platforms. unless diffrent platforms save games in a diffrent format, it should be trivial to enable cross platfrom cloud, as discussed in this thread from another game: https://www.reddit.com/r/shenzhenIO/comments/56b409/crossplatform_cloud_saves_in_steam/
According to this reddit thread, responded to by the dev of shenzen IO, Steam Cloud can in fact work cross platform, but it has to be enabled by the dev. is this something the makers of CE could do? or can it only be done by Goldenhawk?