Gyromite

The poor professor has locked himself in his laboratory. And he's surrounded by dinosaurs. To get out, he needs a bunch of dynamite and your wits. But remember - the old man can't jump. The game is unique in that it is co-operative - the first player controls the professor and the second player controls the gate. To advance the hero, you must control the gate. Be careful - the gate can crush both the dinosaurs and you. The game is similar to Lode Runner, but from a distance.