Code of the Lifemaker was created in 1983.
Found it on BookSleuth, turns out it was written in the 80s, 'Code of the Lifemaker', and it was on Titan, not Mars. Mars was a cover story.
Speak in Code was created on 2012-04-24.
Code Pie was created in 2002.
The Fortune Code was created in 1990.
Code Complete was created in 1993.
The Code Conspiracy was created in 2001.
Code of Rubrics was created in 1960.
The Moses Code was created in 2008.
Chaos Code was created in 2011.
No Code was created on 1995-07-19.
The Code of Life was created in 2001.
Dancing the Code was created in 1995.