Soul Harvest is a small add-on to DeathMatch, in the form of a mutator. Traditionally, when you frag someone, you score a point, however, in Soul Harvest, it gives you a point for the kill, but also provides an additional point if you can do what's required.
It works like this: When you kill someone in Soul Harvest, they die and a soul is spawned. This soul starts to slowly rise at the rate of about half a foot per second. To get an additional point for the kill, you must harvest the rising soul by simply running over the soul and picking it up. When you harvest a soul, a yellow message stating your feat will appear to all players, and everyone in the vicinity will hear a choir voice. This type of gameplay has many advantages. It reduces the effectiveness of snipers and campers. If you are sniping at someone far away, then chances are you will not be able to reach them in time to capture their soul that is rising into the air. This mod encourages close action and tight gameplay, so that players may harvest souls after they kill their opponents. No camping for you!