The walkthrough for this game is split up into different objectives. The game has two primary gameplay modes for single player - three campaigns (split for each faction) and Skirmish, which allows players to play on multiplayer maps with AI.
This walkthrough will focus on primarily the theory for Skirmish (with the release of the Command & Conquer 3 World Builder, it is impossible to create strategies for every multiplayer map) and the how-to for the campaign.
Campaign objectives branch into two separate objective types. Primary objectives, yellow in colour, are essential to the successful completion of the level. Secondary objectives, by contrast, are not essential to the successful completion of the level, but instead unlock various articles in the form of the game's encyclopedia. The encyclopedia covers mostly background information about the game's universe, such as the composition of Tiberium.