Darker No Mercy
This is definitely l4d1 no mercy beta. it is a really nice campaign. however, the downside is that there is no l4d2 weapons in this campaign. so no melee weapons, no incendiary or explosive ammo, no guns from l4d2. its basically all l4d1 related weapons, which is kind of a bummer. however you play with cheats, you can give yourselves some of the l4d2 weapons but still. It's a good campaign because it brings back the l4d1 feeling, which is understandable why they remove l4d2 items but i still hope they added l4d2 weapon items for maybe a separate urban underground campaign for l4d2 stuff.
SPAS 12