
===============================
Alien World ruleset for Freeciv
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Design Philosophy:
------------------

Alien ruleset is very different from standard rules - it
has been one of the design goals of the ruleset that it
should provide users with "second game" to play with
Freeciv. We hope you can enjoy both more standard rulesets
and Alien ruleset, not selecting just one of them to play.


More info:
----------

Before Alien World was made part of official Freeciv
distribution, it was developed independently and was
available from cazfi.net. Documentation of the last
cazfi.net version is available from
https://www.cazfi.net/freeciv/alien/dev/
Though some bits are outdated, it's still the most
comprehensive documentation of the Alien World ruleset.


Changes since last cazfi.net document version
---------------------------------------------

This list is incomplete

- Citizens convert to city owning nationality over time

- Population is measered in hundreds in reports

- Road type "Tunnel" can be built to radiating tiles only

- Techs cannot be stolen from Lunatics or Madmen

- Intercontinental trade routes give same trade than routes
  within one continent. International routes give three
  times as much trade as national ones

- Once player knows "Ocean Cities" tech, borders extend
  to oceanic tiles just like land tiles

- Players are guaranteed to start from a Earthly units
  reachable area of at least 15 tiles

- Explorer cost reduced to 20 shields

- Road type "Tunnel" provides 35% defense bonus for units
  inside

- Burrow Tubes can be built only to connect existing burrow tubes, first
  one needs to be adjacent to a land tile

- Amphibious and Antigravity units kill citizens after successful
  attack against a city, Burrowing units do not

- There's two river types. Earthly units do not gain movement
  bonus from them. Both give trade bonus. Green River gives also
  food bonus, and Brown River production bonus. Both give
  defense bonus counted on natural defense layer.

- There can never be civil war

- Each movement point is divided to 4 fragments. IgTer movement
  costs 2 fragments, river movement 2, road 2, highway 1.

- Specialists have been renamed, but their effects remain the same
  Elvis     -> Culturists
  Scientist -> Scientists
  Taxman    -> Government Merchants

- Governments production and trade adjustments have been changed to be
  always positive. Old negative values have turned to 0, and old 0 and
  positive values have been increased accordingly.

  Gov: prod/trade
  Despotism:       0  /  0
  Communism:      20% /  0
  Democracy:       0  / 20%
  Dual Communism: 40% / 20%
  Dual Democracy: 20% / 40%

- Math Club gets only 30% bonus to science

- There's third veterancy level, "Superb", that is available only for
  units built by Team Gladiators in a city with Training Facility

- Cities cannot be built on Boiling Ocean tiles.

- Cities of Adventurers can grow one size bigger than cities of other
  factions in lack of Basic Infrastructure or radiation fighting methods

- Increased unit move rates:
  Ship:         3
  Destroyer:    4
  Light Saucer: 3
  Bomb Saucer:  2

- Thick Mountains cannot be mined at all until Burrowing is known, but then
  it requires just 17 movement points, road building time reduced to 12 movement
  points

- Empire size causes additional unhappiness only once every 15 bases (was 10),
  and knowledge of Communication eases it so that the step is 20 bases

- Added tech "Controlled Biomass" that provides new unit "Biomass" that can
  transport Earthly and Amphibious units through Radiating tiles

- Water Engineer build_cost increased to 40, like other City Founding units

- Hex topology is used by default. On hex maps Transportation building
  increases city radius to 2 tiles.

- Stealth Spies cannot establish embassies. They are already granted by
  "Communication" tech

- Limited possible startunits to one weak unit type for each startunit role

- Each turn is quarter of a year
