How do I install this mod?
We have made an executable installer to make the installation easy just download the file and run it. If you have any problems with this then you can also download a zipped version and extract it to your …../Steam/SteamApps/SourceMods/ folder.

How do I start playing?
Once you have installed the game restart steam and it should appear in the games list. Just select it and press the launch button.

During play there are some parts of the game which run slowly. Why is this?
The original half-life 2 is a single player game and as such the maps are NOT designed for a multiplayer environment. We have fixed many of these issues and will continue to improve the game-play as much as we can.

Can I play my own maps with this coop mod?
YES we designed the mod to make it very easy to convert maps to work in our mod just see the mapping guidelines on our website. If you have any problems just email us.

I've found a bug which crashes or stops the game from continuing. What can I do?
Well done ! if you send us the details of the bug using the bug report form on our website we will try to fix it.

I am using the Demo version of the game. How can I create a server without a menu option?
Our Demo version of the game will only allow you to play the maps supplied with the Demo. To create a server for your LAN game, you will need to download the HL2coop_Server_Setup.exe and install the srcds Dedicated Server Updates from Valve. See here for more information about this.
Note: Clients on the LAN connect to this server in the usual multiplayer way.

What are the limits of the Demo version?
The Demo version allows you to create a Dedicated Server to which other clients on the LAN can connect, or a client can connect to a public game server running our Dedicated Server. The levels provided are all the maps from Chapters 3 and 4 that include both the on-foot and airboat aspects of all the Canals levels. The Demo version provides the Co-Operative game mode and the in-game Elimination Mode. Note while playing the demo that NPC's (such as the Metropolice) will attack ALL players. The Points system and Multiplayer Vehicle System, we are also happy to inform you, are features included in the Demo too. Click here for some of the other elements brought to you in this Demo release.

What console variables can I use with this Demo?
The following new console variables are available in the Demo version:

cl_enterlevel_delay - change the timer, in seconds, for how long to wait for players to become active at the start of a level, before the Mission Start timer begins.

cl_exitlevel_delay - change the timer, in seconds, for how long players have to reach the end level (the first player to finish the level initiates the timer), before the server changes level.

cl_reset_round - resets the current level.

cl_elimination_mode - toggle Elimination Mode.

cl_airboat_gun - toggle use of airboat gun.

mp_friendlyfire 1 - an existing convar which makes for great fun as you try to be the first to complete the level and receive the bonus.