Technology Advance Flags

Every technology advance in a ruleset can be given zero or more flags by ruleset modders. Each flag gives additional features to the technology advance that has been assigned the flag. A reader can find the flags by looking at the techs.ruleset file in any ruleset directory. The following flags are used in all of the rulesets shipped by the Freeciv21 developers.

Bonus_Tech

The player gets extra technology when reaching the technology with this flag first.

Bridge

Settler unit types can build roads with the RequiresBridge flag over roads with the PreventsOtherRoads flag. This is typically on Rivers.

Build_Airborne

This flag is mostly to help the AI (e.g. an AI hint). From now on the player can build air units.

Claim_Ocean

With this flag, the player can claim ocean tiles even if they are not adjacent to a border source.

Claim_Ocean_Limited

With this flag, the player’s oceanic border sources claim ocean tiles even if they are not adjacent to a border source.