The old thread got closed due to the post limit, so here's a new one with a bit more information.
The official beta testing has started. If you want to participate, join the aftermath steam community group and read the "Download" part in this post!
Steam Community Group: http://steamcommunity.com/groups/gmaftermath
If you play for the first time, I recommend you join server #1 (The one running gm_atomic)
There's no download for the whole gamemode yet, since it's not done yet.
You can, however, download the content that you need to play on the servers:
Link to svn repository: http://aftermath-rpg.googlecode.com/svn/trunk/
There are plenty of tutorials on how to use svn. I recommend using TortoiseSVN as client.
You'll have to do the checkout on your main garrysmod directory ("../Steam/SteamApps/yoursteamname/garrysmod/garrysmod/")
TortoiseSVN, as well as some other clients, will try to create a subdirectory called "aftermath-rpg" for the svn. Make sure this does not happen:
(Remove that part from the path)
Once you've made sure of that, there shouldn't be any problems. You're good to go when it has finished downloading the files.
The size of the svn is about 3.1GB, so make sure you have enough space for that.
The gameplay is simple. You can gain new perks and skills by leveling up. Experience is gained by killing enemies, doing quests and some other things.
You can find companions, fight boss enemies, start fights with other players or explore the wasteland and find hidden caches.
Any progress you're making is saved periodically on the server. You can leave at any time and your characters will be exactly as you've left him when you rejoin. You can have a total amount of 3 different characters.
You can also travel between servers and keep your stats by using the transition points you can find on the map.
Q: Is there an estimated release date?
When it's done. Not sure if that will ever happen.
Q: What maps will be used?
For now there's only support for gm_atomic and aftm_apocalypse_a1 (A modified version of rp_apocalypse).
Q: Will the weapons and SNPCs be released seperately from the gamemode?
No, most likely not. The weapons wouldn't be useable in any other gamemode anyway.
Q: Is it a third-person or first-person gamemode?
Both, you can switch between first-person and third-person just like in Fallout 3/Oblivion. (By using the scroll wheel)
Q: What games is this gamemode influenced by?
Mostly by Fallout 3 / New Vegas, however there are some elements from other games like Oblivion, Skyrim, Mass Effect, Dark Messiah and Sin Episodes: Emergency