All players get 3 actions and 1 movement per turn, in whichever order you want to use them. The actions can consist of anything you could do in real life: search the room, scan adjacent rooms, wield a weapon, kill someone, use various objects to setup a death trap, hide under a bed, start a fire, whatever. Your imagination and the confines of reality are the only limits here.

The movement is simply moving from one room to another. You also have the choice of sprinting, which will allow you to move 2 rooms instead of 1. If you choose to do this, you will not see anything in the room you pass through, and if your second movement is "east" and there ends up being a wall or a closed door there, you will run into it full speed and be knocked unconscious for 1 turn. Sprinting is not advisable unless you know where you're going and you need to get there fast.

When you move without sprinting, you can turn light switches on/off in the room you're leaving or entering as part of your movement. It does not require an action. However, this only works if the light switch is beside the door you're exiting/entering from.

Since you only get 3 actions and 1 movement per turn, you may want to optimize these actions via "if...then" conditions.

For instance, you could say:

-I search the cabinet's drawers.
-If I find a weapon, then I wield it.
-If I find anything useful, then I take it.
-If I don't find anything, then I rip out one of the drawers and carry it.
-If I found a weapon or pulled the drawer out, then I kill Bob with it.

If there is just a gun in the drawer, then the 3 actions will be:

1) Searching the drawer.
2) Wielding the gun.
3) Shooting Bob in the head.

In this way, you can use "if...then" conditions to make sure you're using your 3 actions to their fullest potential.

Note: The exception to this is the Report action, which is free to use. If you have found irrefutable proof that a player is dead, you have the option of "reporting" their death, and it will not cost you an action. This will make their death official, and I will cross them off the player list. If you cannot definitively identify a corpse or otherwise verify a death, then you will be unable to report it.