History Main / BorderPatrol

-> It is pitch black. You are likely to be eaten by a Grue.
--> --{{Zork}}

* A non-VideoGame example: Those We Do Not Speak Of patrol the forest around ''TheVillage''.

* Since you could only drown if you were underwater, ''HalfLife 2'' upgraded the alien leeches from the first game and placed them in water near coastal areas. They start out causing little damage, but the number of leeches increases the further you swim out, creating a sort of exponential damage curve that makes it impossible for you to survive to reach the edge of the map or skip parts of the level.

* In ''HalfLife'' 2, if you venture too far into the water, you are mobbed by carnivorous leeches.
* In the first ''GearsOfWar'', going into dark areas gets you eaten by the Kryll (killer bats).

* A Russian FPS "Truth about the 9th company" reenacts a combat that took place in the War in Afghanistan. If you move too far away from the action zone and cross an invisible border, the game abruptly and summarily ends as you are court-martialled for desertion.

** In ''ResidentEvil2'' there is a similar moment where you could exit the police station(near where you find the valve) but are blocked by zombies, however you can kill them but the game says its too dark to see anyway. The implication here is that outside that door there's just ''too damn many'' zombies.

* ''In SuperMarioKart'', Lakitu would fulfill this trope by picking up racers who went out of bounds (among other things) with a fishing rod and put them back on the track - after taking 2 coins for his trouble.
** This happens in other MarioKart games, too- minus losing your coins.

* In ''[[Game/IRobot I, Robot]], saucers patrol the edges of the shooting sections, making it a very dangerous place, should you wander there.

** It is,however,possible with glitches to bypass them - and drive more then half a hour to make the screen turn black and make you reappear on the other side of the map.TheDevTeamThinksOfEverything .

* ''GrandTheftAuto: San Andreas'' and ''Grand Theft Auto IV'' players who try to skip ahead to the other cities before the plot grants them access will find themselves suddenly slapped with a high wanted level, and usually be gunned down by police helicopters shortly thereafter. I was just going for a swim, officer, honest.

** There are two other examples in the game: Bahamut is encountered early in the game (and you have to run), but you can then encounter him again shortly afterwards, and he will find new ways to rape you (he prevents you from getting to a specific cave). You have to play through ''most of the game'' before you can take him on and beat him (in order to get him as a summon). The other example is Leviathan, who patrols a lake near the game's starting point. Much like Bahamut, he will murder you in his sleep for most of the game, until you're actually powerful enough to beat him (and thereby get to the underwater cave ''he'' guards).

* In ''{{Prototype}}'', trying to cross one of the bridges to the mainland will get you bombarded by an off-screen air raid. However, trying to cross in the water will inexplicably stop your air powers from working and then jump you back to the land for no discernible reason (they give what would be a plausible reason not to be able to cross the water, but it would only make sense if the water ''killed'' you) Also, trying to use helicopter to get out will result in warning for leaving the island and then get blown up.

** In {ResidentEvil2} there is a similar moment where you could exit the police station(near where you find the valve) but are blocked by zombies, however you can kill them but the game says its too dark to see anyway.

* The free game ''[[http://ski.ihoc.net/ SkiFree]]'' has a [[BigfootSasquatchAndYeti Yeti]] chase after you and eat you if you go too far down (or sideways).
**If you manage to keep your top speed long enough, it's possible to stay ahead of the yeti for a long time, in which case a ''second'' yeti will come after you.