Cheat Codes
Click on the "Team" button menu with Circle (or which ever button is currently configured as "Cancel") or the Right Mouse Button. Then, move the pointer over the following icons on the tool bar and press Circle ("Cancel") or the Right Mouse Button on each:

Instant victory
"X", "Square", "Square", "Circle", "Triangle", "Circle".

Nuclear attack
"Circle", "X", "Circle", "Triangle", "Square", "Triangle".

Parabomb
"Square", "X", "Circle", "Circle", "X", "Triangle".

Chronoshift
"Triangle", "Circle", "Circle", "Square", "Square", "X".

Full map
"Square", "Triangle", "Circle", "X", "Triangle", "Square".

Money
"Square", "Square", "Circle", "X", "Triangle", "Circle".

Change ore to civilians
"X", "Circle", "Triangle", "Triangle", "Circle", "X". Note: This code may only be enabled in multiplayer mode after a refinery is present.

Change ore or crystals to gold
"Square", "Circle", "Square", "X", "Circle", "Circle".

Soviet passwords
1 - 17DUXFJ6C
2 - VMBWOQ284
3 - XN37MCCSO
4 - LH06FZZQL
5 - BUVV20LFF
6 - AVYQ10YA8
7 - LZRJTMQAN
8 - YQX4C9GFH
9 - 1QESO8LE0
10 - RKP0UOXJA
11 - CDLKYL7Q4
12 - 8T5GGDK25
13 - X5CDE0KN8

Allied passwords
1 - LZ9SE4HPN
2 - FG0WEU9OO
3 - EC5NAHTU
4 - 9BFVYZAZ8
5 - P4XS4CZVC
6 - FMNAE6U08
7 - 7XIQW4KQI
8 - WPLAGLJ2G
9 - 4TNT8RJ21
10 - FZ0ZY7ZQA
11 - X9FJZVJZI
12 - 5RNHTXLRY
13 - J7VEWVT09
14 - OLHDAPYHL
15 - 17LE3FDV