Since I was 12, I learned many programming languages, ranging from actively using to totally not using.
I mainly use Adobe Photoshop, Unity3D, Mathematica, JavaScript, C# and F#.
Technologies: Unity3D, Adobe Photoshop, Blender
Skills Required: basic 3D modeling, planning, game testing, overcoming procrastination
My first major game I've developed is LaserTD. It is a tower defense game with a lots of unique features:
LaserTD has gained a lots of plays compared to other new games at that time, and it has gained some positive reviews. However, because of its steep learning curve, it did not get a high rating (3.04/5 currently, 4 is popular, and players are picky between 4 and 5).
You can play LaserTD at Kongregate: http://www.kongregate.com/games/ProjSHiNKiROU/lasertd
I have used Processing as a way to get into generative art and interactive graphics programming.
You can see my Processing sketches here: http://shinkirou.org/processing
Technologies: Java, JavaFX
Skills Required: designing a library, ooking up documentation, interface design, debugging
Minesweeper is a game that I have mastered by figuring it by myself. Later, I summarized some mechanical rules for a computer to solve Minesweeper.
I programmed a Minesweeper implementation with a cheat feature as a result. You can try it at http://shinkirou.org/projects/minesweeperfx. Read the blog post about solving Minesweeper here: http://shinkirou.org/blog/2010/04/solving-minesweeper-rules/