I'm honestly surprised a lot of my fellow gamers really just never got the hang of aiming down. While it's true many games have different aim mechanics, nearly all of them share similar features. For now, I'll just discuss some general aiming tactics that would be found in any FPS and will later delve into more specific games, but for now, enjoy!
1.) ADS is Not Necessary
A lot of games maintain the idea that "scoping in" increases accuracy considerably and is nearly always better than hipfire, but this isn't always the case. Take the Halo franchise, for example. There really isn't much of a difference in accuracy between the two views. Sure, accuracy increases slightly (depending on the weapon), but it's much better to get good at Hip Firing first and foremost. With the right amount of skill, players can snipe enemies from many yards away or rain a flurry of bullets down on a few unsuspecting enemies while not having to compensate for situational awareness or kickback. Oh yeah, and zooming in with a weapon while at close quarters is A BAD IDEA. Trust me, it REALLY is. Sometimes weapons work better while scoped in at closer ranges, but weapons like this are few and far between. Just, please...don't ADS with your Sniper Rifle when you're right behind an enemy, it just looks (and really is) ridiculous.
2.) Aim at the Neck
Despite what a LOT of FPS games say, aiming towards the head really isn't that easy, or even practical. When up close and personal with your enemies, it does help a lot, but from farther ranges enemies are hard to see and move quicker than your bullets half the time. Due to this, at range, the neck is probably the safest area to aim for. This is especially true with Assault Rifles or Shotguns, but not so much with Bows or Sniper Rifles (as those weapons have major bullet drop, forcing players to aim above the head instead). When aiming at the neck, make sure to compensate for distance and kickback.
3.) Get the Right Sensitivity
Finding out the best sensitivity for your playstyle on your controller/mouse makes aiming that much easier. Although it really depends on personal preference, incredibly high or incredibly sensitivities are not recommended unless you have extensive practice and are already used to your weapon. If you prefer to be a far range sideliner, I'd pick a lower sensitivity to help make some of those long shots. Higher sensitivities should really be employed when you decide you like to rush at enemies, but again, to each their own.
4.) Learn your Weapons Hitscan, Bullet Drop and Bullet Spread
Learning how your weapon works is one of the easiest ways to aim better. Try to remember how far your bullets usually go, and how much the bullets exiting from the chamber of your gun split askew from the reticule. "HitScan" is a perceived area of damage on a target, or where your bullet must hit to actually harm someone. Try to remember the limit of this area, and how close your bullets must be to harm your opponents.
5.) Lead Your Shots
Basically, "leading" your shots can allow you to kill or harm enemies from much greater distances. Try remembering how long it takes for your bullet to travel and the drag upon it while doing so, and you might just get that insanely awesome cross-map headshot.
6.) Keep Yourself Steady
When aiming with any weapon, it's really important that you don't shake or twitch too much. Try to avoid heavily caffeinated drinks or sugary foods, as this could affect your aim. Try to sit on a stable, flat surface and make sure to avoid finger cramps.
I suppose that's about it for now guys, if you have any other tips for aiming better, make sure to leave them in the comment section.
See you beautiful bastards on the Virtual Battlefield!;
Graysmog