Blatent Game Plagiarism=hilarity

Well, the alien movies probably inspired those anyways.

The official inspiration for Warhammer 40,000 was Starship Troopers by Robert Heinlein.

In regards to the Tyranids being inspired by the Xenomorph from Alien (which I actually watched just an hour before seeing your post), the lifecycle for the Xenomorph is as different as Night and Day from Tyranids.

Alien:
Queen lays eggs
Egg hatches to Facehugger
Facehugger implants Embryo
Embryo matures, explodes from host's chest
Grows to full size within hours
??
Profit!

Tyranids exist to consume all genetic material in the universe and do so on a planetary scale
Tyranids:

The assimilated DNA structures and resources of the planets invaded warp Tyranids into a multitude of genera, all of which have an extremely rapid rate of evolution. Tyranid matter is constantly reabsorbed into biomass reclamation pools, called Digestion Pools, and terraforming devices, called Spore Chimneys, to create new varieties mixing with new assimilated DNA structures of the races of the invaded planet. The digestion and absorption of a planet and its lifeforms by the Tyranids happens over three stages: The first is marked by the spread of Spore Chimneys which spew genetic material across the planet. The genetic material enhances and speeds up the rate of reproduction of the indigenous plantlife and quickly converts these lifeforms into Tyranid genetic structures that allow them to be easily digested. The second is through the creation of Digestion Pools, which allow for a collection of genetic material on a planet by digesting the Tyranids into their genetic material. The third stage is when Hiveships take the material and produce new evolutions and mutations of Tyranids. This material is sent to the Hiveships via Capillary Towers. All of the material at the Hiveships are processed by Norn Queens, a biological factory type creature, whose job is to produce advance species and units to further aid in devouring future enemies.

The appearance of some Tyranids could be inspired by Alien however.

Ya ya ya, there's nothing new under the sun. They may have flat out copied some levels, but I don't see it holding up in any court system this side of California. As if a scene with a sprial staircase can be copyrighted just because it's in a game? There are only so many level designs that can be done before they all start to look alike.

Did you even read the article?

They didn't just design similar stuff. They completely ripped off stuff from other games.

The official inspiration for Warhammer 40,000 was Starship Troopers by Robert Heinlein. In regards to the Tyranids being inspired by the Xenomorph from Alien (which I actually watched just an hour before seeing your post), the lifecycle for the Xenomorph is as different as Night and Day from Tyranids. Alien: Queen lays eggs Egg hatches to Facehugger Facehugger implants Embryo Embryo matures, explodes from host's chest Grows to full size within hours ?? Profit! Tyranids exist to consume all genetic material in the universe and do so on a planetary scale Tyranids: The appearance of some Tyranids could be inspired by Alien however.

that sound like alien vs preditor the movie

that sound like alien vs preditor the movie

Either everything I've learned regarding Alien/Predator storylines has been wrong or....yeah.