Board Thread:Questions and Answers/@comment-16749030-20140129215501/@comment-3361105-20140129222341

I would definitely read Crisis on Infinite Earths first.

I would then be sure to read Countdown to Infinite Crisis and Villains United.


 * Countdown to Infinite Crisis explains much of what leads to the tie-ins, but the events that take place in it bring about Infinite Crisis.
 * Villains United is the story of the villains uniting (duh) behind a plan by a certain somebody who figures heavily in Infinite Crisis. It also tells the story of the Secret Six rebelling against that plan.

Other lead-up stories include Rann-Thanagar War and OMAC Project, and Day of Vengeance but I don't think they are integral to the plot of Infinite Crisis, that I can think of.


 * Rann-Thanagar War is a Hawkman/Adam Strange story about a war between the planets Rann and Thanagar.
 * OMAC Project is about a satellite Batman created that starts using nanotech to take over people's bodies, and they keep attacking super-heroes, and I think it's super boring.
 * Day of Vengeance is about the Spectre deciding to destroy everything related to magic in the DCU.