Episode 1, Terran Mission 4, The Jacobs Installation
Locate the guy in orange to unlock the cheat.

In the first level of the Zerg campaign, go down into a corner after you save the first two hives to find the Mega Build cheat disc. Simply touch it to unlock a cheat to make your build faster.

Where found: Episode 3, Protoss Mission 6, Into the Darkness
Go right and down to the first open area, then stay to the left and walk to the end of the path to get a message about "sacred ground". Wait for about 20 seconds to activate the cheat.

Complete all 56 missions in the episodes.

Complete the first three episodes.

Episode 2, Zerg Mission 5, The Amerigo
Have Karrigan walk to the left of the cell with the animals in it.

Episode 5, Terran Mission 7, Patriot's Blood
Surround the bear in the upper middle section of the map to get the cheat.

Choose Cheats from the Options Menu, then highlight the cheat and press the A Button to mark it with an X.

Episode 4, Protoss Mission 3, Legacy of Xel'Naga
Capture the flag to the north of your starting base.

Hi Res Enable Code	f109BA902400
Infinite Vespine Gas-Episode I, IV & VI	810B1D783B9A 810B1D7AC9FF
Infinite Vespine Gas-Episode II	810B1D803B9A 810B1D82C9FF
Infinite Vespine Gas-Episode III	810b1d903b9a 810b1d92c9ff
Infinite Minerals-Episode I, IV & VI	810B1D483B9A 810B1D4AC9FF
Infinite Minerals-Episode II	810B1D503b9a 810B1D52c9ff
Infinite Minerals-Episode III	810b1d603b9a 810b1d62c9ff

Beat all the missions in the game (58 in all) to unlock hidden two player Co-Op game for two players called: Resurrection.