You will download the Sector Selection screen from the website.
You will then install the sector selection screen.
Then you will create and account and login.
It will connect you to the sector selection server, which will list each sector that is online, and how many people are on line. it refreshes every 10 seconds.
You choose your sector, and the sector selection screen will open up the correct exe file. If there is an update, the server will notify the client, and it will download the new files before opening up the game.
As far as game features go:
Some rooms will be 20 on 20, others may be 50 on 50, depending on map size.
TDM and CTF style games.
TDM game lenghts will varry (around 10-20 minutes each)
CTF (NO time limit)
Player stats will be kept. There will be the following score charts viewable by choosing to do so in the in game menu. Score of online players (stats for players currently playing with you) Top 100 players monthly, and top 100 players all time.
It will track:
Points
Kills
Deaths
K
Ratio
Flag Captures
Wins
Losses
Ties
Play Seconds
Cash(for ctf games only)
Experience
Average Bounty
Highest Bounty
For ctf games, there will be a store, where you can buy your gear, everything from ammo, to armor, to new guns.
There will be a real time chat at the bottom of the screen.
There will be a radar screen
There will be a scripting language for the chat that is unique to the game, which will return certain values such as the direction you are heading, your position on the map etc.
There will be private messages, and team only chat as well.
There will be commands that only moderators can use to do things like:
restart game, send arena messages, ban people, etc.
I think that gives you a good idea on what im shooting for