It uses six-sided dice to resolve actions. It uses a set of character statistics, as well as skills and edges, that function similarly to the d20 System 'Feats' systems. Characters belong to a class, and can adopt more than one class as they progress.
The CODA System has characters advancing and refers to characters as having N advancements, similar to having a particular level in the d20 System. Advancing gives the player a number of picks with which to buy upgrades to their character's statistics and abilities.
Characters have a total hit point pool segmented into health levels; each health level of damage incurred imposes a wound penalty to certain actions. Characters also have a number of 'weariness' levels; extended or intense activity can result in penalties to certain actions based on the number of weariness levels lost.