Lost Eden(1995)

Lost Eden is an adventure game set on an eerie planet populated with dinosaurs. Your civilisation is menaced. Armies of Tyranns, led by Moorkus Rex, are gathering around your kingdom. Soon they will swarm in, destroy everything and kill your people. However, there is a single hope. There are legends telling that several hundreds of years ago, men and dinosaurs cooperated to build 5 mighty Citadels that were almost invulnerable to the Tyranns. Today, all the Citadels but one have been destroyed.