The theme of
Seventh Cross is evolution. The player begins with a protist, and through eating and consuming, progresses through two other stages until it becomes an animal. The game begins in a lagoon, where the player's organism must avoid predators while nourishing itself. If the creature dies, it is returned to its lowest form unless it has successfully evolved into its 'origin' stage, in which case the creature regresses to that instead. After death, any parts gained by evolution are kept, but any gathered food is lost.
Seventh Cross contains six stages, each with a boss. The stages take place in different
biomes, ranging from the pond to a barren future.
Evolving The creature gains parts by touching the monolith in each level. Six colors, chosen at the beginning by the player, are mapped to six attributes: offense, defense, psi power, intelligence, dexterity, and healing. By creating patterns with these colors on a 10×10 grid, and possessing the required amount of EVP, the creature may gain a new part it may add to its head, body, legs, or arms. The logic behind what patterns yield what parts, however, remains unclear. These parts may be "equipped" any time, but each require specific amounts of nutrients found in certain foods, among which are protein and fiber. After a while, the player may add enough parts to the organism to fend off and even kill other creatures, fight the stage's boss creature and advance to the next stage. Each part has different attributes that enhance particular areas like movement speed and attack strength. These parts may be added ala carte; that is, a lynx's head may be placed upon an organism with a crab's body and frog's legs. This may result in odd combinations of creatures akin to Microsoft's
Impossible Creatures. ==Reception==