Collectible card games often suffer from conflicts between their rules and what is written on the cards themselves. When designers introduce new gameplay mechanisms , they cannot take into account all card combinations that the tricks players will use to win. That's when FAQ documents and erratas are published, to resolve any problem that might occur during a game.

The Heroes IV CCG published by DGA Games is not exception. A FAQ and Errata can now be found on the official site, along with some behind-the-scene information: "In the original game system, we used no dice. Instead we used Action Numbers that were printed in the corners of all the cards." Also, the publisher kindly provides a house rule that allows simultaneous retaliation. Take that, Heroes V!