Controls

Running
The hostile world in Unreal doesn’t afford you a whole lot of
opportunity for leisurely strolling. So, by default, your character
will run (well, trot briskly really) whenever you use your movement
keys. Depending on how you have your controls configured,
you will use the arrow keys or your mouse to move
around. Use the up arrow and down arrows to move forward
and back. Turn left or right using the comma and period keys,
or by moving your mouse in the desired direction.
Walking
In situations where caution, precision, or stealth are required, it
may be to your advantage to tread more cautiously. In these
instances, hold down the assigned walk key to move precisely
and silently.
Looking Around
If you are not using the MouseLook option, use the
assigned keyboard keys to look up and down. If
the MouseLook option is enabled, your view will
move along with the movement of your mouse.
Picking Things Up
Picking objects up in Unreal is a simple matter of running
over them. Any object you run over will automatically
be added to your inventory or put into use,
depending on the object. If you already have the maximum
allowed number of an object, or
cannot use an object, you will not pick it up when you run over it.
Opening Doors
In most instances, you open doors simply by running into them.
There will be times however when doors are locked and require
a key, or that a certain action be performed before they can
be opened.