Billed as the world's first atheist card game, Opus-Dei: Existence After Religion, is a new, entertaining, and irreverent card game that takes place in a universe where religion is almost completely something of the past. In this world without religious dogma, the players represent rival "Zeitgeists" competing in a battle of rational ideas to maintain ethics, morals, and meaningful lives for all by virtue of reason!

The game (with no affiliation with the catholic organisation, "Prelatura del Opus Dei") is built around the world of philosophy, though no philosophical knowledge is needed to play, as it is a purely strategy-based game. The philosophical foundation is however only the beginning, the next steps include expansion sets that explore historical events, politicians, artists, musicians, writers and revolutionaries of all kind.

Opus-Dei: Existence After Religion™, is a new entertaining and irreverent card game that takes place in a universe where religion is almost completely something of the past. In this world without religious dogma, the players represent rival “Zeitgeists” (German, Time-Spirits) competing in a battle of rational ideas to maintain ethics, morals and meaningful lives for all by virtue of reason!

When playing the game, a queue of potentially existing philosophers, scientists and fools are lined up for each round. These humans are worth varying amounts of points, according to their intellectual status and magnitude. It is then up to each Zeitgeist, in their turn, to create the best of them into their particular World by playing up to two cards that can serve their best interests. The player with the most points at the end of the game wins!

Opus-Dei: Existence After Religion™ is easy and quick to learn, but difficult to master. It has a very simple game-play structure, even though luck has a very minimum influence on the outcome.

Playing the game will continuously reveal endless possibilities, as not one game ever resembles any previous due to the many incredible combinations of specific action cards. All this makes it a highly addictive game. We should know, we've been playing it every day for four years without ever getting bored!

Furthermore, every card has short but precise bonus information describing the specific philosopher, scientist or fool, or as on the action-cards, explaining the idea, term, or concept that names the given card. This means the game also can be used as a miniature work of reference in (primarily) the world of philosophy. This general concept of bonus-information will also be maintained in the expansion sets. To label the game's overall genre, one could call it “info-tainment".

Basically, the goal of the game for each player (or 'Zeitgeist') is to collect ('create') the brightest minds into their "World” (scoring the highest possible points) in order to win. Players draw 'Action-cards' to manipulate the game in their favour, primarily by playing cards that re-arrange the line of potential existence to fit his/her advantage, before creating the first human in line by the Genesis feature (which indicates the direction of the line, being towards it).

Overall game-play:
3 rounds called "years" are played by laying out ‘lines of potential existence’ (or 'Pots') consisting of 12 human-cards in line one after another, and again (twice) when the previous year is finished/empty. The game ends (typically) after the third year, and then each player’s human-points are counted up. The player with the most points wins the game.