If you are looking to learn the game, visit http://www.playdota.com/learn OVERVIEW
INSTALLING REIGN OF CHAOS
Installing Warcraft III: Reign of Chaos
First, place the CD in your CD drive. Open My Computer (if you're using Windows), click on the icon of the CD, and install it.
INSTALLING FROZEN THRONE
Installing Warcraft III: The Frozen Throne
You just installed Reign of Chaos. Take its CD out, place the TFT CD, and let's install The Frozen Throne.
UPDATING THE PATCH
Updating The Patch
Let's now update our patch to the latest one.
Updating the patch is very necessary. To get the latest patch, go to http://www.getdota.com/patch
You need to the download the full patch because you're starting from the very beginning. The patch version can be seen at the bottom-right corner of the opening menu when you start the game.
Once you have downloaded your patch, it's time to install it.
Note: When the patch starts installing, the screen will turn black. Then it will install by itself. After it's done, the screen will go back to normal.
The good thing about patch 1.22a, is that you don't need a CD to play the game (it has actually been this way since 1.21b).
Congratulations! You now have the latest patch for DotA. It is 1.22a as of now. Refer to the changelog made by this update for more info.
DOWNLOADING THE LATEST MAP FOR DOTA
Downloading the Latest Map for DotA
You can get new maps at this site. The latest is 6.57b, which is also the current stable map.
The default directory is very important. Any tampering with it will have effects on Garena and downloading from Warcraft, especially when playing with others.
Congratulations! You now have the latest map for DotA. It is 6.57b as of now.
You can now play DotA.
But you have to adjust a few things as well. That's where Options comes into the picture. Click Options on the Main Menu (4th button from the top).
GAMMA: Brightens or darkens up a screen.
RESOLUTION: I find the 1024x768x16 Resolution fitting for my monitor. If you have a bigger monitor, select a bigger resolution. A bigger resolution means a more detailed screen.
MODEL DETAIL: Defines how detailed model units can be.
ANIMATION QUALITY: Enhances animation, i.e. attacks and some effects.
TEXTURE QUALITY: Improves the overall texture, from the menus, the terrain and the models. Medium allows you to read the loadscreen.
PARTICLES: Enhances detail of other objects and doodads.
LIGHTS: Sets how light affects everything.
UNIT SHADOWS: This must be on to ensure good gameplay.
OCCLUSION: Determines how an object can be hidden by other objects. Best set to On. This also allows -weather effects.
SPELL DETAIL: This must be set to High at all times, for me. If it is set to Low, you will find it hard to notice when spells are around.
The only things needed to tamper with here are:
MOUSE SCROLL: How sensitive do you want your cursor to be?
KEYBOARD SCROLL: Same here, but with the keyboard.
ALWAYS SHOW HEALTH BARS: As of 1.22a, health bars can now be permanent.
AUTOMATICALLY SAVE REPLAYS: This feature automatically saves replays inside your replays folder.