Lead your chimpanzee troop through the forest. Patrol the ridge, climb, swing, and hold your ground.
Lead your troop to hold the ridge. The morning lasts twenty minutes: when the light goes, the troop holding the most ground takes the ridge. Hold both nesting sites for twenty seconds and you take it at once. Or settle it alpha to alpha: shove the rival alpha out of the square you are both standing in and the ridge is yours on the spot. If the leopard takes your leader, it is over.
The ridge is a grid of 10 m cells (Tab / View for the map; the corner minimap shows it too). Stand in a cell with at least two of your troop and it turns your colour (the faint lines on the ground are the cells); the other troop's ground has to be worn down first. Taking a cell brings another chimp running to join your party; losing one sends one of yours off. A lone chimp claims nothing, so keep the party with you. Display (F / X) in a cell to mark it twice as fast. The bars under the title show each troop's share.
Your tribe is 35 chimps, but chimps live in fission–fusion: only a party of four to ten travels with you, and others arrive and peel off on their own. Display while threatened to call more in, up to twelve. An A over the head marks a leader (the alpha); every other chimp carries his number in the tribe, in the troop’s colour: green home, orange rival.
The computer leads the rival troop from the north-west nest (a second player can take it over at any time). It patrols and claims ground just as you do. When troops meet, numbers and displays decide: the bigger side's leader can display within a few metres to drive the other leader back, and a badly outnumbered troop loses a follower to the winner. Outnumbered yourself? Back off and call your troop in.
Step into the same square as the rival alpha and it becomes the ring: the square lights up, and the first alpha whose feet leave it loses the ridge. Shove (Space / RB) lunges and knocks him back a stride if he is in front of you; it needs a second to recover, so time it. Brace by holding the stick toward him with your feet planted and a shove only moves you half as far. Two shoves at once clash and both slide. Numbers do not count in the ring, and there is no climbing out of it: while the duel is on, the alphas stay on the ground. Alphas outweigh followers everywhere: an alpha's shove sends a follower flying, and no crowd of followers can move an alpha.
It hunts about every ten minutes. Face it and display to drive it off, or get up a tree. Caught from behind or unaware, your leader is taken.
He never saw it coming. When a leopard stalks you, face it and display to drive it off, or get up a tree.