There have been many versions of Xconq. This listing shows all of those that I know about; there are probably others as well.
In addition to the program releases listed below, many people have created and released their own game designs.
1986
Initial work on a curses-based Empire clone, manual entry of large world map earth1.map (now earth-1deg.g)
1987
port to X10
conquest 1.0 (May?)
2.0, 3.0, 4.0 (never released)
1988
port to X11
5.0 (June)
5.1 (July)
1989
uconq (first attempt at server/client)
5.3 (discovered on net, unknown author)
5.4 (by Greg Fisher)
5.4a
1990
1991
1992
5.5 (with Robert Forsman)
5.5.1
5.5.1a
6.0 (by Alain Brossard)
1993
Start of Mac port
First developer versions of 7.0
1994
more developer versions of 7.0
1995
5.6 (by Michael Peters, has Motif interface)
7.0 (August)
7.0.1 (August)
1996
7.1.0 (April)
1997
1998
7.2 (April)
7.2.1 (May)
7.2.2 (June)
1999
(various snapshots, 7.2.85 and up)
2000
7.3.0, 7.3.1, 7.3.2 (June)