Freeciv

"Transform Terrain" - Transform tile terrain type.

* UI name can be set using ui_name_transform_terrain

* terrain type must be one that can be transformed

"Cultivate" - Transform tile terrain type by cultivating

* UI name can be set using ui_name_cultivate

* terrain type must be one that can be cultivated

"Plant" - Transform tile terrain type by planting

* UI name can be set using ui_name_plant

* terrain type must be one on which units can plant

"Pillage" - Pillage extra from tile

"Clean" - clean extra from the target tile.

* UI name can be set using ui_name_clean

* actor must be on the same tile as the target.

* the target extra must be present at the target tile

* the terrain of the target tile must have a non 0 clean_pollution_time

or non 0 clean_fallout_time, depending on the removal cause

"Build Road" - Build road at the target tile.

* UI name can be set using ui_name_road

* actor must be on the same tile as the target.

* the target tile can't have an extra that the target extra must bridge

over (see extra type's bridged_over) unless the actor player knows a

tech with the "Bridge" tech flag

"Build Base" - Build base at the target tile.

* UI name can be set using ui_name_build_base

* the target tile can't have an extra that the target extra must bridge

over (see extra type's bridged_over) unless the actor player knows a

tech with the "Bridge" tech flag

"Build Mine" - Build mine at the target tile.

* UI name can be set using ui_name_build_mine

* actor must be on the same tile as the target.

* the target tile can't have an extra that the target extra must bridge

over (see extra type's bridged_over) unless the actor player knows a

tech with the "Bridge" tech flag

"Build Irrigation" - Build irrigation at the target tile.

* UI name can be set using ui_name_irrigate

* actor must be on the same tile as the target.

* the target tile can't have an extra that the target extra must bridge

over (see extra type's bridged_over) unless the actor player knows a

tech with the "Bridge" tech flag