Cheat Codes

Hint 1 of 20:

Here they are.  Use them wisely.

Hint 2 of 20:

Press ENTER and type them in.  Do not type the colon.  Everything after the
colon is the code description.

Hint 3 of 20:

VALDEZ: 5000 Oil Units.

Hint 4 of 20:

MAKE IT SO: Quicker Construction.