Human Memento is a Sci-Fi play-to-earn game in which you build a brigade with Explorers and Time Machines to travel back to past eras to collect mementos. In Human Memento, one can travel into the stone, agricultural, iron, industrial, and information age to collect Brigades mementos of past civilizations. Brigades are NFTs created from the combination of all your Explorers and Time Machines. Explorers vary in rarity and skill points. The eras to which Explorers could travel depends on their skill points.