Linkage is competitive card game that is simple to learn, yet offers lots of depth, forward thinking and replay-ability for 2 to 4 players. But best of all, Linkage was designed and themed around a process normally taught in high school biology, DNA Transcription, (when an RNA copy is made from DNA for protein synthesis or other in a cell) and in this way offers a unique, engaging and tactile experience for someone to familiarize themselves with this fundamental concept of biology.