ACHIEVEMENT - HOW TO UNLOCK Celebrated - Collect all the medals. Chain Gang - Kill 2 Malthusians within a timed chain attack. Challenged - Complete the Challenge Room. Davy Jones' Locker - Neutralize 10 Malthusians in underwater combat. Drowned - Drown a Malthusian. Honor - Collect 50% of the medals. My Hero - Save chief billingham. Private Eye - Collect all documents and objects. Survivor - Complete the game. Swept Off Their Feet - Sweep 3 Malthusians off their feet with water. Tinker - Complete a hack. Vengeance - Kill 5 Mathusians with fire or electricity.