I want to know what makes half life so popular. I have seeing post of "half life 3 is coming" a ton throughout the years, and so it peek at my curiosity. Can you explain what the story is about in HL 1 and HL 2, and what makes them so awesome. Thanks
						
					
					
				- 
   
	A "half-life" is the amount of time required for 1/2 of a given quantity of a particular substance to decay.
 
										 
					 
		    