In the fictional universe of Warhammer 40,000, the Tyranids are a race and a playable army in the tabletop miniatures wargame. The Tyranids are aliens from outside new tyranid codex pdf galaxy who have come to devour all life, one planet at a time.
They are collectivly controlled by a highly intellegent hive mind which can not be reasoned with. Tyranids come in diverse forms, each individual having been engineered to fulfill a specific role.
All of their technology is biological, named in the Universe as biomorphs due to their components being alive. Tyranids were first described in Rick Priestley’s Rogue Trader, the first edition of the Warhammer 40,000. At that time they were not an emphasized race in the game, instead representing a limited number of occasionally encountered alien antagonists. Tyranids were given a complete makeover and became a major race, popularized by a number of successful expansions.
Unlike most Warhammer 40,000 races, the Tyranids do not have a direct Warhammer Fantasy Battle counterpart, but share a horde mentality with the Skaven and Lizardmen armies. This, along with the extensive use of larger, stronger creatures and primal defense mechanisms leads to the widely-drawn inference that the Tyranids are the closest Warhammer 40,000 counterpart to the Lizardmen in terms of how they play.