In this card game, you need to collect sets of 3 identical Spectrum cards and place them on the table. Or collect the set of 3 Order cards and keep it in your hand until the end of the round.
You need to avoid the 4th Spectrum card that matches a set you have placed on the table or the 4th Order card if you have the other 3. Also, avoid holding a Chaos card at the end of the round.

On your turn you can seek a card, trade a card or declare a battle. You can't hold Order cards while holding a Chaos card. If you discard a Chaos card, all hands are rotated among players until the discarding player calls Stop! Well, the title does say "Chaos