A slight warning, these downloads are pretty big and I have not tested them recently, please comment below if any aren't working, or if you know links I haven't listed here.

​

CivClassics

At first no official world download was released but a world download of the map used for CivLegacy was done and shared by squareblob, and a torrent of it can be found on the civwiki discord: https://discord.com/channels/415706745566920714/415706745566920716/969253157001629800 or an Internet Archive link here: https://archive.org/details/civclassic2-eotw-squareblob

Later Wingzero54 released an "official" map from a CivClassics backup dated December 7th 2021
https://www.mediafire.com/file/2ovos6ihdvfodsk/CivClassic_Map_Dec_7_2021.zip/file

Civcraft

A torrent magnet link to the Civcraft maps https://gist.github.com/ttk2/de677c02c3d13b3547c543b57e9e5a63

direct downloads of 1.0 maps: https://archive.org/download/Civcraft10maps

CivUniverse 1.0

This is from their discord and it's a 4.5GB world: https://civuniverse.s3.amazonaws.com/v1/world.zip

TheRealmsMC

2 of their maps can be found on their subreddit wiki, Natum and Spera https://www.reddit.com/r/TheRealmsMC/wiki/worlds

spera can also be found on this post

https://www.reddit.com/r/TheRealmsMC/comments/4bjcuw/goodbye_spera/

Nerd.nu

this series of reddit Minecraft maps once had a civ server, or at least a survival server that used civ plugins, a lot of their old maps can be found here: http://mcp-dl.com/ although survival rev 26, the actual civ server doesn't seem to be among them, if anyone knows where to find the map comment below please. There is a google map render at least: http://redditpublic.com/carto/survival/s26/carto/#/-949/64/118/-7/0/0

Devoted

a Devoted 3.0 map torrent can be found here: https://www.reddit.com/r/Devoted/comments/7r3t1k/devoted_30_initial_map_download_oct_14_2017/

downloads of the Devoted 2.0 map at different dates can be found here: https://www.mediafire.com/folder/dzdx6cg1vr4n8/Devoted-2.0

CivEx

an illegal world download of the 1.0 map from the CivExNuclearTaskForce subreddit that reddit renamed due to being inactive.

https://www.reddit.com/r/a:t5_38rr4/comments/3aonzi/the_end_is_upon_us/

CivRealms 2.0

Nothing has been officially released. mike0war claims to have a copy of a backup.

​

Other

A lot of links to map downloads can be found at this spreadsheet maintained by the minecraft data mining community: https://docs.google.com/spreadsheets/d/1I02dRtS6B8RymHOOL7LrrG89E-JRzGwg_GChpDyw2EE/edit?pli=1#gid=0