Step 1: Download & Install Red Alert
Click the link below to navigate to CnCNet, where you can download the community installer for Red Alert. This download features both Singleplayer and Multiplayer.
Click here to download from CnCNet.
Note: this game has been officially been released as freeware, more information can be found here.
Step 2: Run the installer
The Red Alert installer will guide you through on how to install the game. Make sure you do a full web install when prompted.
Once the installer has finished, you can open the settings tool. In the settings window, you can set your in-game resolution.
Step 3: Play
You now have the ability to play Single player or play online via the CnCNet launcher.