c-evo-dh (C-evo Distant Horizon) is a fork of C-evo New Horizons
  https://app.zdechov.net/c-evo/
which is itself a fork of C-evo  
  http://www.c-evo.org/

(Its called 'Distant', because a main new feature is its use of larger maps.
They can now go up to 400% of standard size, instead of 230%.)  


For information on C-evo, see

  http://www.c-evo.org/text.html
  http://www.c-evo.org/faq.html
  http://www.c-evo.org/bb/index.php

  https://civilization.fandom.com/wiki/Game_mechanics_(C-evo)
  https://civilization.fandom.com/wiki/Strategies_(C-evo)

There is an excellent in-game manual.
Its in Czech, Chinese, French, German, Italian, Portuguese, Spanish and Russian, as well as English  

On Linux, extra documentation is in
  /usr/share/doc/c-evo-data
