The cover art varied. 1st and 2nd editions had a landing craft and were white, green and red in colour. 3rd and 4th editions had Rodger MacGowan cover art showing a soldier and some rubble on an orange background. Anzio was one of the first games to feature step losses for units. While there are only about 20 different German units in the Basic Game for example, each unit has 6-8 counters for its various strengths which can change via replacement during the game.
Most Allied units have fewer steps but more replacements are available.
Another main feature of the game is in the supply rules. Units that are isolated from their supply source for two friendly player-turns are eliminated. We are playing the Basic Game which is 15 turns long covering from the Sept II to Dec IV turns, 1943. No Supplementary rules are in play. Salerno, Foggia, Cassino, Napoli, Terracina, Termoli, Pescara, Anzio, Roma at the end of the Dec IV turn.