In Air, Land & Sea: Critters at War, two players compete for control of each theater of war by playing cards and strategically using their special abilities to win battles. Whoever earns the most victory points over multiple battles wins the war!

As Supreme Commander, you must carefully deploy your forces across three possible theaters of war: Air, Land, and Sea. The order in which you play your battle cards is crucial, as is how you play them. All cards can be played face up or face down. Playing a face-up card triggers its tactical ability, but the card must be played in the corresponding theater. Face down cards are wild cards and can be played in any theater, but they only have a strength of 2 and do not grant tactical abilities.