Ancient Egypt was populated entirely by space aliens. It was also a huge arms manufacturer, so much that you could find rockets just lying on the ground, waiting to be used.
Painkillers will keep you going even if you’ve been shot 100 times.
Sewers are decently lit, spacious and fairly easy to get around in/full of puzzles.
It’s easy to carry around: several handguns, a dozen or so grenades, several shotguns, at least one assualt rifle, at least one submachine gun, some kind of rocket laucher and maybe a heavy machine gun. Plus several hundred rounds for each.
Ammunition is unlimted for armies.
Bad guys will never have more then a single clip of ammunition on them.
Boxes of ammunition in games will rarely have has much in as a real box would.
If you have to escort someone and you can’t control their movments or tell them when to go, chances are they’ll be so stupid that keeping them alive will be a major headache. You’ll also be sorely tempted to kill them yourself.
Doors can rarely be opened with anything other then a key, if they can be opened at all. This applies even if they are made of plywood and you have a box of grenades.
If you can pick it up, you should. It will almost certainly come in handy later.
Crates go with everything.
Just because it looks like you should be able to get there does not mean you can.
Some kinds of glass are completely impervious to damage, even from weapons that will blow giant monsters into bloody chunks.
Local police forces have very effective instant communications networks, allowing them to put out an APB on you with an description so accurate that you and you alone can be arrested.
You may only use one kind of special weapon. You start with a soccer ball, you keep the soccer ball, no swords for you.
Enemy forces are often equipped with Magic Homing Grenades™, which automatically know your position, even after you’ve ducked out of sight and moved several meters from the last spot you were seen at.
The rules of warfare will have to be rewritten to accomodate the fact that enemies can teleport into any previously cleared area.
A monster that is one small arms round away from dying is still just as strong, fast and deadly as a fresh one.
Hiding and hoping for rescue isn’t an option.
No one makes a decent flashlight or night vision goggles.
You should always be running no matter where you are. Walking just wastes time.
No matter how large and cosmopolitan the city, any destination has only one route leading to it. This route will involve wading through sewers, climbing fences and scaling walls. All other routes, streets, thoroughfares will be hopelessly barricaded by immovable debris.
No matter how powerful the explosive, it will only affect humans, monsters and occasionally open exits. Otherwise even a crate of TNT won’t so much as scorch a wall.
There’s only two things to do in your home, three people you can call on your phone (or talk to in any crowd), and at most four things you can say at any given time.
Nazi Germany had access to killer cyborgs, crashed flying saucers, legions of the undead, 1920s-style death rays, and lost the war anyway.
Any attempt to infiltrate an enemy base will require you to crawl through at least one ventilation duct.
It is possible to carry three handguns, three submachine guns, three rifles, several hundred rounds of ammunition for each, a bagful of hand grenades, and several disposable rocket launchers without negatively affecting your rate of movement.
There is no injury sustainable in battle that one cannot fully treat by oneself using a portable first aid kit.
i’t’s a valid strategy to send 5 infantrymen and/or two tanks against a heavily defended border blistering with linked gatling guns, tanks and tac-nuke missile trucks (at least the computer thinks it is in C&C Generals)
an “angry mob” can take down a tac-nuke truck and be unaffected by the explosion
in fact, an “angry mob” will be able to take down any opposing unit, even armor-plated reinforced ones, once the mob has been equipped with AK-47’s
Anthrax/biotoxin and radiation does not affect your troops, if you’re the one that launched said attack, even if your infantrymen are standing in a pool of all of the above
You’re a terrible swimmer unless you change clothes.
Plumbers have wicked ups, whereas elfin warriors do not.
The evil maniacal villain isn’t very creative. Some of them will even happily provide you with weapons to kill him. And when they’re not plotting world domination, they’ll play golf, tennis, racing, or party games with you without so much as batting an eye.
The most vocal pacifist tends to be the one racking up the most kills.
Minions can spawn ex nihilo.
You can roll your entire armored body into a sphere less than 1/4 your standing height.
You can stop bleeding if you crouch down and wait long enough.
You can hang from edges of cliffs for as long as you want, and better yet, the people walking along the top of said cliff won’t be able to see you.
The fortress teeming with armed guards won’t notice when one of their own has their throat slit, and yet they’ll somehow be able to see you hanging upside down from a third story building.
Everything that is either 1) moving, or 2) not nailed down can be eaten. Some things will also give you unique powers.
The area between cities is always infested with scores of vicious man-eating beasts. No coordinated attempt has ever been made to eradicate these beasts or even clear a relatively monster-free pathway between cities for the purposes of trade.
In fact, supply and demand does not exist - Product X will always cost the same amount, no matter what city one purchases it in.
There is only one form of currency which is accepted at face value by every shopkeeper on the planet, even in primitive societies with no concept of currency.
The concept of the refund is nonexistant - shopkeepers will only refund you one-half the original purchase price of a product, even if you never used it.
Weapons and armor can be used indefinitely without breaking or requiring repair or refurbishing.
Automatic weapons never jam or overheat.
Despite the existence of steam-powered locomotives, steamships, zeppelins, mecha capable of land or air travel, and underwater breathing apparati suitable for transcontinental voyages, the preferred method of intercity travel is by riding a giant flightless bird.
If attacked by evil creatures of shadow, you should be able to kill them by whacking them with a stick. (Ico)
Generally the way to become a better fighter is to kill things. There’s no such thing as “practicing”; if you don’t actually kill them you don’t learn anything.
Many of the things you kill will be carrying some useful item, or at least an item that would be useful if you didn’t already have 30 of them. You’ll never find them carrying a grocery list, old ticket stubs, or photos of their children.
All societies are cash-based; no one ever carries credit cards. But it’s okay, because you can carry an infinite amount of cash.
Savage beasts roaming the wilderness often will be carrying a bit of money. It’s unclear how they carry it or where they’d buy anything, though.
An evil boss will always keep the item or weapon crucial to beating him or his dungeon in his dungeon, and you almost always need the item or weapon you found in the last dungeon to get it.
Health drinks, first aid kits, and ammunition are strewn haphazardly all over the place. Even the sewer will have health items lying around in the filth.