You should modify this NDA to fit your own needs.
NON DISCLOSURE AGREEMENT
This Non-Disclosure Agreement (hereinafter “Agreement”) by and between ____________________________residing at___________________________________________ (hereinafter_________) and _____________________________ residing at _________________________ ________________________________________(hereinafter_________), is entered into to provide for the confidentiality, protection and handling of Proprietary Information related to a browser game to be known as _______________________________________ for the purpose [...]

Do you or anyone you know spend time playing multi-player games like Mafia Wars, Vampires, FarmVille, Pirate, or Dragon Wars?Do you get PAID for doing that? Or do you just do it for pure fun and entertainment?What if you could still continue to play those games, fulfill your craving for entertainment, and actually get paid [...]

A good idea indeed! I would actively encourage it, as it will make you learn a lot of things in a lot of different areas. However, before attempting to pick a game engine, or to start coding your own, you should consider a few things:

What do YOU like as a game (e.g. [...]

Space Commander 
An online space war game in which each player starts with his own planet. The first important step which should then be taken is to build facilities including energy plants and mines to collect raw materials. This material can then develop new buildings, including shipyards for space vehicles, ships and weapons to develop defenses [...]

 
Gangster World

This is a Gangster Multiplayer Online Game with many unique options. You start as an ordinary laborer and you end up in the world of the Mafia. You will be asked to do crimes muscles to grow in the gym. with each rank you will get more benefits, you can buy new weapons, new [...]

Duliga is a PHP written MySQL based multi player online / web game played by Browser. It reverts to real soccer / football results. Users set up a team of real players that competes in a league and various cups aginst other users teams.
Project Admins : duliga_de 
Developers : 1 
Database Environment : SQL-based 
Development [...]

The Dragon Knight game engine is an online game system created by Jamin Seven. It is an RPG-style game in which characters explore the map, fight monsters, gain experience and buy items, among other things. It is written in PHP4, with a MySQL database backend. While it was originally envisioned as a medieval/fantasy type game [...]

Deploying your Game
So, your game is complete and ready for the masses, but how do you get it to them? That’s where deployment comes in.
The first step in deployment is hosting your game, later we will focus on exposure in other words advertising your game (free and paid methods).
Hosting Your Game
Cost
Cost is, as it is [...]

Designing your game
Caution! Yes, caution is definitely called for when designing a game. Avoid newbie mistakes! Follow this advice:

Start small. Most newbie game programmers dream of making the next hit game. If you’re just starting out, this is an impossible goal! It will only lead to frustration and defeat. You must start small; the only [...]

I want to be a Game Designer
So you want to be the Idea Man? The fact of the matter is that everyone developing games has their own ideas and they have limited time, so the chance of you finding quality coders, and artiss to make your game is miniscule. Unless, of course, you pay them ;).
Sometimes development [...]