Innovation: Echoes of the Past is an expansion for Carl Chudyk's Innovation, released in 2010, that follows the construction of the earlier game as both include 110 cards, 105 cards that are divided into different decks (labeled age 1 to age 10) and five cards that display special achievements that can be claimed. The expansion's 110 cards are all brand new.

In loose terms, Innovation is a Civilization-style game in which players start with access to low-powered cards in age 1, then build up to more powerful cards in later ages, stacking new acquisitions on old to build the strength of their holdings. Players can meld cards, score points and take special actions (called "dogma actions") unique to their cards in play in order to claim achievements. The first to claim 4-6 achievements, depending on the number of players, wins the game.

Innovation: Echoes of the Past changes game play from the base game in a few ways. First, there are now two draw decks to get cards from in each age -- players draw Echoes cards or Base cards depending on their hand. Second, the maximum player count is now increased to five.

Third, and most interestingly of all, Innovation: Echoes of the Past introduces new game mechanisms. With foreshadow, a player can stash a card under their player board, then bring it into play (and use it) on a later turn when he melds a card that's from the same age or a higher one. With echo, when a player takes the dogma action of a card in play, they can receive additional actions showing on that card and any other cards visible in the same stack.