Add Left 4 Dead and Left 4 Dead 2

game_eggs/steamcmd_servers/left4dead/README.md

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+# Left 4 Dead
+
+## From their [Website](https://www.l4d.com/)
+
+Set in the immediate aftermath of the zombie apocalypse, L4D's survival co-op mode lets you blast a path through the infected in four unique “movies,” guiding your survivors across the rooftops of an abandoned metropolis, through rural ghost towns and pitch-black forests in your quest to escape a devastated Ground Zero crawling with infected enemies. Each "movie" is comprised of five large maps, and can be played by one to four human players, with an emphasis on team-based strategy and objectives.
+
+### Server Ports
+
+L4D servers require 1 port to be open. The port can be safely changed to any other.
+
+| Port      | default |
+|-----------|---------|
+| Game/rcon | 27015   |
+
+## Steam Download [SteamStore](https://store.steampowered.com/app/500/Left_4_Dead/)
+