Cheat Codes (Lost Viking mini-game)
While playing the Lost Viking mini-game, press [Enter] to display the console window. Then, type one of the following codes and press [Enter] to activate the corresponding cheat function:
"Piercing The Shroud" secret mission
In the "Media Blitz" mission, where you control the Odin in the city, go to the far bottom-right corner of the map. Destroy the red civilian building on the little floating platform. There is a pathway to the building from the small enemy expansion base that is just north of the player's starting position. Once the building is destroyed, "secret documents" will be revealed. Pick the "secret documents" up with any ground unit, and then complete the mission as normal. The "Piercing The Shroud" secret mission will now be accessible through the Star Map. Note: You cannot play the secret mission after going to Char, as you have to go to another planet. Thus, you must go to the load menu and load a game from before Char to play the mission.
Lost Viking mini-game
[Left Click] the arcade machine at the Cantina on the Hyperion to play a space shooter mini-game.
Zerg Queen quick larval injection
Select all queens with "control group". Hold [Inject Larvae], then press [Backspace] to jump between each hatch and [Left Click] that hatch. This will use the closest queen to cast "Inject Larvae", without having to press [Inject Larvae] each time.
Exploding creatures
[Left Click] any creature multiple times to make it explode.
Hidden dialogue
[Left Click] units multiple times to hear secret dialogues.
Marine in "Havens Fall" mission
In the single player campaign, search the lower left corner of the map near the refugees. You can find a frozen Marine just before the bottom left Zerg base in the water.
Marine in "Piercing The Shroud" mission
In the single player campaign while in the loading bay before the room with the Brutalisk, go outside through the door. Follow the rock ledge as it leads up, and more of the map will be visible. Continue until you find a Murloc Marine.
Marine in "Welcome To The Jungle" mission
In the single player campaign, you can find a Murloc Marine near the left edge of the map, slightly north of your base. He is standing on a cliff edge that is surrounded by trees.
Marine in "Zero Hour" mission
In the single player campaign, search the top of the map just above the left Vespene geyser. You can find a Tauren Space Marine that enters an outhouse. Repeatedly [Left Click] the outhouse, and it will shoot into space.
Blizzard reference
During the Protoss missions, watch the TV to see a music advertisement for LVL800ETC featuring a lot of songs. All those songs are from a metal band called LVL80ETC, which is made up of Blizzard employees and is dedicated to all things StarCraft and Warcraft. The lead singer is the head of Blizzard's art department.
Successfully complete the "Ghost Of A Chance" mission and unlock the Ghost rifle. Go to the armory on the Hyperion. [Left Click] the Ghost rifle to examine it. Keep looking at the screen until Nova (from Blizzard's unreleased game StarCraft: Ghost) briefly appears and disappears.
Diablo reference
During "The Devil's Playground" mission, go to the bottom right corner of the map on Redstone III. You will find Diablo, from the game of the same name, surrounded by lava. He will attack your units when discovered.
World Of Warcraft references
Once you are on the ship's cantina, look in the upper left to see a red female holograph doing the same dance as the female night elf from World Of Warcraft.