The first game in the trilogy will consist of the Terran campaign, and is set to be titled "Terrans: Wings of Liberty."

The second Zerg-focused title will be "Zerg: Heart of the Swarm," with the third game being "Protoss: Legacy of the Void." "[The second and third games] will be like expansion packs, but we really want them to feel like standalone products," said Blizzard's Rob Pardo.

Each campaign will be very different, with Pardo announcing the Zerg campaign will contain RPG elements. The Protoss campaign will likewise be differentiated by elements of diplomacy. In addition, the Terran campaign will feature a Protoss mini-campaign.

The campaigns are planned as concentrated, epic storylines, with enough content to justify a full release. As a result, the games will now feature more in-game cinematics and story content.

Blizzard added that the plans for the multiplayer component are unchanged by the splitting of the campaigns. However, some units will now be unique to the campaigns and will not be playable in multiplayer.

Pardo noted that the decision was necessary to maintain the quality of the product, the alternatives either being a long delay of the game, or a scaling back of the campaigns.

More details may become available during BlizzCon, which continues through this weekend.