Og and its second edition Land of Og are short, humorous role-playing games where the PCs are cavemen in a world full of dinosaurs. When speaking in in-character, players are limited to a 17 word vocabulary (you, me, rock, water, fire, tree, hairy, bang, sleep, smelly, small, cave, food, thing, big, sun, go). The game uses 5 attributes (Strength, Brains, Speed, Hitting, Health) which range from 1 to 18, and a simple leveling system using 5 classes (Strong Caveman, Smart Caveman, Fast Caveman, Hitting Caveman, Healthy Caveman). "Things You Can Do" are skills, and characters also pick "Things You Can't Do", which are generally pretty obvious (Magic Missile, Pick Pockets, Teleport, etc). Combat use a dice pool variant.