Heart of the Cards is a trading card game first person shooter. It has elements of both, though the core gameplay loop is most familiar to FPS players. In the game, you fight against waves of enemies in an arena, using magical trading cards as your weapons. Getting hit by enemies makes you drop cards, and killing enemies makes them drop cards. If you lose all of your cards, you lose the game.

Controls

• Movement: WASD
• Sprinting: Shift+WASD
• Draw a card / throw a card: Left-click

Source

This game is distributed under the GNU GPLv3 license. You can find the source code and assets on my Git.