Stealth

> “You can’t kill, what you can’t see!”
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> —Prince Kassad
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In vanilla *Zero Hour*, stealth is an element that’s widely considered useless by the players, mainly due to how easy it is to detect stealth units, everything from the basic base defence to the basic reconnaissance support power can unveil stealth units and structures. A single Gatling Cannon defence can potentially ward off dozens of the stealth General’s units.

In *Contra*, stealth has been heavily revamped and rebalanced, it is now much harder to detect and is divided into two types: unit/structural stealth and mine stealth.

## Unit/Structural Stealth

This type of stealth is similar to the conventional type of invisibility found in Zero Hour, and is usually detected by scout units: Sentry Droid for the USA, Listening Outpost for China and Radar Van for the GLA. Base defences are now largely incapable of detecting this type of stealth.

However, certain stealth detectors have limitations which prevent them from revealing specific types of units. Certain combatant units can also detect stealth enemy units, although their detection capabilities are usually very specialized.

## Mine Stealth

This type of stealth functions differently from unit stealth, it’s usually associated with demo traps, mines and booby traps. Normal scout units cannot detect this form of stealth, and sniffing them out requires special sapper units, which can not only detect them but also detonate them from a safe distance away.

Most conventional units cannot fire on mines or demo traps, however, idle artillery units will automatically open fire on detected demo traps and mines.

## List of Stealth Units & Structures

### USA Laser

* Sentry Drone—Stealthed when stationary & not attacking.
* Colonel Burton—Stealthed when not attacking.
* Scout Drone (General’s Powers)—Stealthed at all time.

### USA Air Force

* C-27 Spartan/F-35 JSF/F-22A King Raptor/All support drones—Stealthed when not attacking after Stealth Covering upgrade has been applied.
* Comanche—Stealthed for 10 seconds when skill is activated after Stealth Covering upgrade has been applied.
* Sentry Droid—Stealthed when stationary.
* Colonel Burton—Stealthed when not attacking.
* B-3 Wyvern—Stealthed at all time.
* B-2 Spirit (General’s Powers)—Stealthed at all times.
* RQ-3 Dark Star—Stealthed at all time.

### USA Superweapons

* Sentry Droid—Stealthed when stationary.
* Colonel Burton—Stealthed when not attacking.
* B-2 Spirit (General’s Powers)—Stealthed at all times.
* F-117 Stealth Fighter—Stealthed when not attacking.
* Scout Drone (General’s Powers)—Stealthed at all times.

### USA Cybernetics

* Scout Drone (General’s Powers)—Stealthed at all time.
* Terminator—Stealthed when not attacking.
* Leech Droid—Stealthed when stationary.
* Trackhound & Guardian Droid—Stealthed when not attacking with Drone Invisibility upgrade is applied.
* All support drones—Stealthed when not attacking with Drone Invisibility upgrade is applied.
* Pegasus & RoboRaptor—Stealthed when not attacking.
* Spider Nest—Stealthed at all times.
* Spider Mine—Stealthed when not attacking.

### USA Boss

* Scout Drone (General’s Powers)—Stealthed at all time.
* Sentry Droid—Stealthed when stationary.
* Colonel Burton—Stealthed when not attacking.
* F-117 Stealth Fighter—Stealthed when not attacking.
* Beetle Mines—Stealthed when not moving.

### China Tanks

* Black Lotus—Stealthed when not hacking.
* Listening Outpost—Stealthed when not moving.

### China Infantry

* Super Lotus—Stealthed when not hacking.
* Super Hacker—Stealthed when not hacking enemy vehicles.
* Listening Outpost—Stealthed when not moving.
* Sniper—Stealthed when not taking damage.

### China Nukes

* Black Lotus—Stealthed when not hacking.
* Listening Outpost—Stealthed when not moving.

### China Flame

* Black Lotus—Stealthed when not hacking.
* Listening Outpost—Stealthed when not moving.
* Flamethrower Turret—Stealthed when not attacking.
* Fuel Tube—Stealthed at all times.

### China Boss

* Black Lotus—Stealthed when not hacking.
* Listening Outpost—Stealthed when not moving.
* Phalanx Drone—Stealthed when not attacking.
* Sniper—Stealthed when not moving.

### GLA Chemicals

* All defences—Stealthed when not attacking when Camo Netting upgrade is applied.
* Chemical Pump & Demo Trap—Stealthed at all times.
* Jarmen Kell—Stealthed when not attacking.
* Radar Van—Stealthed when Camo Netting upgrade is applied.
* Karakurt & Scolopendra—Stealthed when not attacking when Tank Camouflage upgrade is applied.
* Crop Duster—Stealthed on the ground.
* Toxin Rebel & Alshain—Stealthed when not attacking when Camouflage upgrade is applied.

### GLA Stealth

* All structures—Stealthed when not attacking when Camo Netting upgrade is applied.
* Demo Trap—Stealthed at all times.
* Warrior, Alshain, Worker & Terrorist—Stealthed when not attacking when Camouflage upgrade is applied.
* Saboteur & Hijacker—Stealthed when not taking damage.
* Jarmen Kell—Stealthed when not attacking.
* Radar Van—Stealthed when not attacking.
* Bomb Truck—Stealthed when not taking damage.
* Gun Buggy—Stealthed when stationary.
* Flak Cannon—Stealthed when deployed.
* Assassin—Stealthed when stationary.
* Hazael—Stealthed when not taking damage.
* Any unit—Stealthed when not attacking when GPS Scrambler is applied.

### GLA Demolitions

* All defences—Stealthed when not attacking when Camo Netting upgrade is applied.
* Advanced Demo Trap, AT Mines, AA Mines, Cluster Mines and Nuclear Charge—Stealthed at all times.
* Bomb Truck—Stealthed when not taking damage.
* Radar Van—Stealthed when Camo Netting upgrade is applied.
* Demo Rebel, Alshain & Terrorist—Stealthed when not attacking when Camouflage upgrade is applied.
* Jarmen Kell—Stealthed when not attacking.
* Saboteur—Stealthed when not taking damage.
* Efreet—Stealthed when not taking damage.

### GLA Assault

* All defences—Stealthed when not attacking when Camo Netting upgrade is applied.
* Demo Trap—Stealthed at all times.
* Jarmen Kell—Stealthed when not attacking.
* Radar Van—Stealthed when Camo Netting upgrade is applied.
* Rebel & Alshain—Stealthed when not attacking when Camouflage upgrade is applied.
* Flak Cannon—Stealthed when deployed.
* Any unit—Stealthed when not attacking when GPS Scrambler is applied.

### GLA Boss

* All defences—Stealthed when not attacking when Camo Netting upgrade is applied.
* Demo Trap—Stealthed at all times.
* Jarmen Kell—Stealthed when not attacking.
* Radar Van—Stealthed when Camo Netting upgrade is applied.
* Rebel—Stealthed when not attacking when Camouflage upgrade is applied.
* Assassin—Stealthed when not taking damage.
* Any unit—Stealthed when not attacking when GPS Scrambler is applied.

## List of Stealth Detectors

### USA Laser

* Colonel Burton—Detects mines and traps only.
* Sentry Droid—Detects all but stealth aircraft.
* ARV—Detects mines and traps only.
* Scout Drone (upgrade)—Detects stealth units and structures only.
* Strategy Center (Search & Destroy)—Detects stealth ground units and buildings only.

### USA Air Force

* Colonel Burton—Detects mines and traps only.
* Improved Spy Satellite—Detects stealth units and structures only.
* Sentry Droid—Detects all but stealth aircraft.
* Bobcat—Detects mines and traps only.
* Scout Drone (upgrade)—Detects stealth units and structures only.
* RQ-3 Dark Star—Detects stealth units and structures only.
* F-22A King Raptor—Detects stealth aircraft only.
* Strategy Center (Search & Destroy)—Detects stealth ground units and buildings only.

### USA Superweapons

* Colonel Burton—Detects mines and traps only.
* Sentry Droid—Detects all but stealth aircraft.
* Bobcat—Detects mines and traps only.
* Scout Drone (upgrade)—Detects stealth units and structures only.
* Pathfinder—Detects stealth infantry only.
* Strategy Center (Search & Destroy)—Detects stealth ground units and buildings only.

### USA Cybernetics

* Terminator—Detects mines and traps only.
* Leech Droid—Detects all but stealth aircraft and mines.
* Repair Droid—Detects mines and traps only.
* Scout Drone (upgrade)—Detects stealth units and structures only.
* Improved Spy Satellite—Detects stealth units and structures only.
* Cybernetic Commando—Detects everything.
* Strategy Center (Search & Destroy)—Detects stealth ground units and buildings only.

### USA Boss

* Colonel Burton—Detects mines and traps only.
* Sentry Droid—Detects all but stealth aircraft.
* Scout Drone (upgrade)—Detects stealth units and structures only.
* Leonidas—Detects everything.
* Pathfinder—Detects stealth infantry only.
* F-22 Raptor—Detects stealth aircraft only.

### China Tanks

* Listening Outpost—Detects stealth units and structures only.
* Emperor, Guan Yu & Helix with Radar module—Detects stealth units and structures only.
* Black Lotus—Detects everything.
* Engineering Crawler—Detects mines and traps only.

### China Infantry

* Super Lotus—Detects everything.
* Field Engineer—Detects mines and traps only.
* Sniper—Detects stealth infantry only.
* Listening Outpost—Detects stealth units and structures only.

### China Nukes

* Listening Outpost—Detects stealth units and structures only.
* Field Engineer—Detects mines and traps only.
* Black Lotus—Detects everything.
* Overlord & Helix with Radar module—Detects stealth units and structures only.
* MiG-31 Interceptor—Detects stealth aircraft only.

### China Flame

* Field Technician—Detects mines and traps only.
* Listening Outpost—Detects stealth units and structures only.
* Black Lotus—Detects everything.
* Immolator, Zhu Rong & Helix with Radar module—Detects stealth units and structures only.
* MiG-31 Interceptor—Detects stealth aircraft only.

### China Boss

* Field Technician—Detects mines and traps only.
* Listening Outpost—Detects stealth units and structures only.
* Black Lotus—Detects everything.
* Phalanx Drone—Detects everything.
* MiG-31 Interceptor—Detects stealth aircraft only.

### GLA Chemicals

* Radar Van & Radar Van Scan—Detects stealth units and structures only.
* BTR-50 Engineer—Detects mines and traps only.

### GLA Stealth

* Radar Van & Radar Van Scan—Detects stealth units and structures only.
* BTR-50 Engineer—Detects mines and traps only.
* Assassin—Detects stealth infantry only.
* Hazael—Detects everything.

### GLA Demolitions

* Radar Van & Radar Van Scan—Detects stealth units and structures only.
* BTR-50 Engineer—Detects mines and traps only.
* Zipper—Detects stealth aircraft only.

### GLA Assault

* Radar Van & Radar Van Scan—Detects stealth units and structures only.
* BTR-50 Engineer—Detects mines and traps only.

### GLA Boss

* Radar Van & Radar Van Scan—Detects stealth units and structures only.
* Assassin—Detects stealth infantry only.
* Zipper—Detects stealth aircraft only.