Amendment mod for Half-Life 2

Amendment is a government funded project to create advanced robotic technology capable of exploring planets and moons which previously were unexplorable. The programme started with simple robots able to perform basic functions, but as exploration became more demanding the technology needed to be enhanced. After 25 years of extensive research, four robots were created able to explore worlds and environments that no human could. They were known as Alpha, Beta, Charlie and Delta. These went on a series of 3 missions to Venus to gather information on it's properties and landscape structure. The first mission was a failure. Alpha was inexplicably destroyed upon entering the atmosphere of Venus and the remaining robots sustained minor damage. The second mission was a failure. Delta and Charlie were inexplicably destroyed upon entering Venus' atmosphere and Beta sustained minor damages. The third mission is currently in progress.