History Main / DefogOfWar

** Terrans has the Comsat in ''I'' and Orbital Command in ''II'', which reveals a targeted area on the map. Ironically, most professional players prefer not to use them (in II) this way since cloaked units are such a pain. They'd usually rather sacrifice the SCV in ''II'' rather than scan for information since the energy can create the much more effective MULE harvester. In the late game, multiple Orbital Commands are typically built for spamming some MULEs but may be used to scout otherwise.

* ''VideoGame/{{Starcraft}}'' and ''VideoGame/StarcraftII'' has the Comsat, which reveals a targeted area on the map.
** Ironically, most professional players prefer not to use them (in II) this way since cloaked units are such a pain. They'd rather sacrifice the SCV rather than scan for information since the energy can create the much more effective mule.

** In ''VideoGame/AgeOfEmpiresII'', when you research Cartography, you clear up a lot of the fog of war by seeing the same thing as your allies. There isn't any way to remove it if you have no allies, though. The Spies tech comes close, letting you see through your enemies' eyes, but it costs 200 gold per villager. By the time you can afford this, like in AOEIII, you've already mostly won.

!Anime and Manga
* ''Anime/HaruhiSuzumiya'': In "Day of Sagittarius", the computer club cheats in the eponymous game, by removing the fog of war from their side.

* Removing the fog itself by weather manipulation or blowing it away

* ''VideoGame/AdvanceWars'':

* In ''VideoGame/HeroesOfMightAndMagic'' series, giant trees and mage huts with magical eye networks served precisely this purpose, the first one revealing a big area around the tree, the second - a moderate area around the eyes. The Grail building for the Tower/Academy, a flying ship, was an instant Defog of the entire map.
* In ''VideoGame/{{Civilization}}'', discovering satellites reveals the entire world map (and causes NPC civs to ask to trade world maps more often, which only gets you updated info on new/captured settlements at this point). Air units can perform a recon action, which does as you would expect and reveals a part of the world that is in-range.
* ''Videogame/AgeOfWonders'' 2+ has capturable structures Watch Tower that gives a good view (and defensive walls) and Reflective Pool that shows some other area.
* ''Videogame/AdvancedStrategicCommand'' has spying satellites and radar units. When unavailable, a player may have to use AntiAir units or anything else with good view value to the same end. It's an important advantage, especially when either side tries to pull HitAndRunTactics.

* ''VideoGame/RebelInc'' allows you to request periodic SurveillanceDrone sorties from the Coalition, that will reveal what is going on in the area they are observing. They do not attack, but soldiers operating in FogOfWar are at a large disadvantage, so a DefogOfWar at the right time can completely turn a battle around. You can upgrade them with more fuel efficiency (a drone sortie lasts longer), additional maintenance crews (sorties become more frequent), and better sensors (increasing the power of soldiers fighting in areas they observe). By themselves, they cannot attack, but have a good synergy with [[DeathFromAbove Airstrikes]]: Drones locate insurgent bases while airstrikes destroy them.

FogOfWar is something that often annoys players, being unable to see enemy units and such in it, even worse if the computer [[TheComputerIsACheatingBastard is unaffected by it]] and can prey on your units with ease. Fortunately, there are tools at their disposal to clear the fog and see whatever was hidden inside.

** In ''[[VideoGame/CommandAndConquerRedAlert Red Alert]]'', the Soviet deploy spy plane from their airfield while the Allies launch GPS satellite form tech center.

** In ''[[VideoGame/CommandAndConquerRedAlert3 Red Alert 3]]'', powers like this are even more limited. The only real intelligence support power belongs to the Allies, who can send invulnerable scouting drones to reveal a line across the map.

FogOfWar is something that often annoys people, being unable to see enemy units and such in it, even worse if the computer [[TheComputerIsACheatingBastard is unaffected by it]] and can prey on your units with ease. Fortunately, there are tools at their disposal to clear the fog and see whatever was hidden inside.

* ''VideoGame/AdvanceWars'': Sonja's main strength is her increased vision range in fog.