The humans in Gears of War from

The best strategy when dealing with the normal wretches is to use the shotgun. Don't aim (so shoot from the hip) and then melee when they get closer to you. If they get too close you can always shoot the shotgun then roll backwards to give yourself some distance.

With the Lambent wretches, the explosion you see when they die also effects other locust. So, if possible, try and get a lambent wretch to explode next to other enemies. Two birds with one stone :-)

If a lambent wretch gets too close to you, melee and roll backwards. Or shoot and roll backwards (as you've probably found out, the explosion hurts.....a lot!!)

Games For Windows Was going to become defunct but later after 2014's E3 Gamespot reported to the contratary as seen here.

The community is low, there is little in way of support for the title. If you CAN get the updates installed there may be a few players but somewhere in lower to middle hundreds, nothing like it was in its heyday.