theres this enemy in half life 1. and this is really cool environmental storytelling. so if you play half life 1. there are these guys, and, theyre aliens and they actually they shoot at you with these beams okay and these aliens they have three eyes and they attack you and theyre evil, but if you go to half life 2, which is in the future after half life 1, youll play throughout that a little bit, and youll actually come to realize, that these aliens are related to the ones in half life 2, because theyre in half life 1 as well, but in half life 2, these same aliens, they have three eyes, and they also shoot lasers, theyre actually related because theyre similar