Keep in mind this list of features is incomplete, the plugin contains a lot more features as listed.
You don't need to install other HG plugins like HG-Alliances or HG-Beacons since those features are included already.
General:
HUD which shows survival stats, your items and more
Upload Zcore-MySQL, Soundlib & Zcore-Lootspawner to your server (no configuration needed).
Upload the plugin, sounds, models & materials to your server.
Add "hg" to you databases.cfg (no SQ lite support).
If your server has issues with geoip you can create an empty textfile, rename it to geoip.autoload and place it inside the extensions folder to fix it.
If you like to install CustomPlayerSkins to enable glow keep in mind it can lagg your server if your CPU is not strong enough.
Use the command "zcore_loot" to add loot spawn points to your map, I recommend to add at least 300 spawns per map otherwise the server may crash!
It's a good release but it's very unrespectful for the people that bought this from you, i personally did and as far as i remember i spent around 25 euros for this plugin and now it's been released for free.