This is the 6th release of a port of FreeCiv 2 for AmigaOS 4. 
There is an install script now, but extracting
the archive and running should work as it used to.
For a summary of the general changes, read NEWS-2.3.

Tilesets can be changed after installation from the command line or
data/.freeciv/.clientrc prior to starting the client.

The game consists of a server and a client.  The suggested client 
requires the following shared objects (if in doubt try the larger, 
static binary freeciv-sdl-os4.0):

libfreetype.so
libpthread.so
libSDL_mixer-1.2.so
libsmpeg-0.4.so
libvorbisfile.so
libvorbis.so
libogg.so
libmikmod.so
libFLAC.so

and (these are standard)
libSDL-1.2.so
libstdc++.so
libgcc.so
libc.so

The client is basically the SDL variety with two of its features dropped, 
namely launching of the server and locale support. The included starting 
script allows you to load a saved game, since this also requires a
(re)start of the server. You can save from within the client. Remember
that if your Freeciv username (option -n ) does not match the one you 
used when saving, you won't get in the game.

In case the public server list doesn't come up, point your browser at
http://meta.freeciv.org/metaserver.php

Other known bugs, noticed while testing OS4 release (OS specific?):
* Client: Some of the keyboard commands stop working if you run in
fullscreen and return to Freeciv screen with the keyboard, in other words
a key is depressed. So if you care about the keyboard shortcuts, use a
mouse for this. Cursor/numpad keys always work.