Kostas Giannakakis
- 2025-07-29Einstein's Riddle
- 2025-07-28Card Games
- 2025-07-22Snap Card
- 2025-07-12Brick Brain Puzzle
- 2025-05-30Peg Solitaire by Kostas Giannakakis
- 2024-11-02Λυσάρι Λέξεων
- 2019-08-30Silly Dragons
- 2018-09-29Christmas Gift Bringers
- 2016-05-06Chess Math
- 2015-11-28Solo 3D
- 2014-06-04Puzzle Solver
- 2014-06-03Fruit Catcher
- 2013-01-28NimChallenge