QuarryTypes

There are various target types that teams and special weapons can be assigned to attack. These are general target categories since the actual disposition of potential targets cannot be precisely predicted -- thus these serve as guidelines for the computer AI.
—Red Alert source

Quarry¹ types is a feature first introduced in Red Alert. As explained by the above comment in the game's source code, they are used to specify general target categories for AI teams and special weapons (super weapons in later games).

Usage

Quarry types are used as a parameter in at least three places:

• Team mission (RA1) or script action (TS to YR) type 0 ("Attack...") to instruct the team to attack specific kind of targets
• Script action (RA2/ YR only) type 57 ("Chronoshift Task Force to a target type...") to have the team Chronoshifted to a specific kind of target if appropriate Superweapon is ready and charged.
• Trigger action type 35 for special/super weapon targeting

Available QuarryTypes

Red Alert

Index	QuarryType	Description
0	QUARRY_NONE	None or invalid, cancels attack mission
1	QUARRY_ANYTHING	Any enemy building or unit (same as "hunt")
2	QUARRY_BUILDINGS	Any enemy building
3	QUARRY_HARVESTERS	Any enemy Ore Miner
4	QUARRY_INFANTRY	Any enemy infantry
5	QUARRY_VEHICLES	Any enemy ground vehicle
6	QUARRY_VESSELS	Any enemy ship
7	QUARRY_FACTORIES	Any enemy factory
8	QUARRY_DEFENSE	Any enemy defense building
9	QUARRY_THREAT	Any enemy objects approaching (or already in) its base and which are in an attack mission
10	QUARRY_POWER	Any enemy power facility
11	QUARRY_FAKES	Any enemy fake building

Tiberian Sun to Yuri's Revenge

Index	QuarryType	Description
0	QUARRY_NONE	None or invalid, cancels attack mission
1	QUARRY_ANYTHING	Enemy object (vehicle/aircraft/infantry/building)
2	QUARRY_BUILDINGS	Enemy building
3	QUARRY_HARVESTERS	Enemy Harvester or Ore Miner
4	QUARRY_INFANTRY	Enemy infantry
5	QUARRY_VEHICLES	Enemy ground vehicle
6	QUARRY_FACTORIES	Enemy factory
7	QUARRY_DEFENSE	Enemy defense building
8	QUARRY_THREAT	Enemy objects approaching (or already in) its base and which are in an attack mission
9	QUARRY_POWER	Enemy power facility
Red Alert 2 additions
10	QUARRY_OCCUPIABLE2	Building that can be occupied
11	QUARRY_TECH2	Tech building

Target selection is based on the scan range defined by TargetDistanceCoefficientDefault or its technotype override of TargetDistanceCoefficient. If targets are available within that range, then closest of those is selected. If no targets are available within that range, then first built by that enemy is selected.

Notes

• ¹ ↑ In this context, quarry means prey, not a mine.

• ² ↑ Presumed internal name.