Invincibility:
Beat the last level of Episode 3: Protoss (Eye of the Storm). This code will be called special in the cheat menu.

Find Faster Building:
Play Episode 6: Brood War Zerg. Play the first level. After you beat the second hive, take the right path instead of the left. There will be a very small disc at the end of the trail. Pick it up and the code will be downloaded into the cheat menu. This code will say Mega Build in the cheat menu.

1000 Minerals or Gas:
Play through the game until getting to Episode 1 (Terran) X-07: Patriot's Blood in Brood War. Locate the second Terran computer beacon in the room with four civilians. Use the bottom door to exit. Move to the right until the fire bats are encountered. Go through that area and locate the Ursadon being held in a cell. Use a marine to open the cell door and approach the Ursadon. Move all your units into the cell when it asks to be hugged and press B. This cheat will give you 1000 minerals and gas.

Turn off the Fog of War:
Play Episode 4: Brood War Protoss. Play the third level. In the beginning of the level you will see corsairs fly over an island with a white flag on it. Build a shuttle and take any man to the island. Have the man walk over to the flag. The cheat will be downloaded. You will be able to turn off the blackness in your mini-map and on the screen when this cheat is activated.

Build Quicker:
Repeatedly press B on any building to build it faster.

Episode 6 Mission 10:
You are supposed to finish all the missions in the game to get infinite energy for units that use special attacks like the cloaking ability for the Ghosts.

Open Tech Tree:
Play the "In the Darkness" mission (Protoss). Walk down the hall until reaching the stairs. Turn left and go down until the advisor tells you to turn back. Turn around and go back a short distance, then go back to the spot where the advisor told you to leave.

Thanks to Revolution readers kisskicks1, Brent, Philip Archibald, Sk8erPunk, Fightin' Squirrel and pichu!