One in the Chamber.

So, lots of people find One In The Chamber confusing or hard, I made this guide to add a few tips.

Arrows:
Arrows are limited, therefore it is harder to get people. The tip I'd use for Arrow is one; not to worry about it too much, new arrows refill every so often and then you can carry on hitting people. Two; When you dodge people, their arrows go into the ground or on walls/areas near you, you can pick them up. So therefore, when you dodge people, remember to pick up their arrows and shoot back.

Aim:
In the game, everyone is always moving, because they want to dodge the arrows and also relay a few back. So what I do, is wait for someone to think it's safe so they may become a little calmer and less paranoid, thus, they easily forget about people still trying to get them. This is when you take your shot. However, if someone is close to you, find a vantage point, wait until they are out of arrows, and get them where they cant move. If someone is running, aim in the direction you think they will go.

Vantage Points:
In my opinion, the higher up you are the easier it is to gain an Advantage. The One In The Chamber maps always have places of height, however, it is then generally easier to get shot at, since being higher sometimes means being an easier target. Therefore, you have to be sneaky about where you shoot from.

General:
Switch between Third game mode and first game mode, to see if people are behind you, or near you. I use Space as my Third Game Mode key, so it's easier to see the people around me. From here you can see who to shoot, and who wants to shoot you.