In one of the later Myst games is a feature in which you can switch movement control from the keyboard and mouse to the mouse only. The wheel is used to move forward and back and turning works as it does now (using the mouse). This eliminates the use of the up/down arrow keys, or WASDX keys.
I find it makes play easier, and allows the player to concentrate on the use of other key controls (Flash Light, Jump, crouch, run, etc).
This would be a great addition for GGMax
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