TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Hedgewars - Hedgewars is a Free to play, Single-player and Turn-based Strategy video game developed by Hedgewars Development Team.
Puzzle Strike - Puzzle Strike is a Puzzle, Board, Single and Multiplayer video game created and published by Sirlin Games.
Counter-Strike 2D - Top-Down Multiplayer Shooter
Othello - Othello is a Puzzle, Board, Single and Multiplayer video game in which the main task of the player increases his marbles in order to win the game.
Ironfell - Ironfell is a time travel themed massive multi-player online real time strategy game.