Master of Break an Eggs

Master of Break an Eggs flips the usual egg-stealing formula around: instead of sneaking eggs out of someone else's nest, you walk up to eggs with a pickaxe and break them open yourself, racing the resulting pet home before the zone's guardian catches you. Stolen pets from rival bases are fair game too, and placing pets in your pen earns money every second that funds pickaxe and pen upgrades.

Taking up to four pets along at once gives small bonuses, and progressing from the Easy zone toward Insane is how you reach the rarer, secret pets that the early areas simply don't have.