Spider

The Spider is the first enemy encountered in the game. It is used in the tutorial to teach the player how to fight. The third journal entry refers to the Spider.
 *  Yet another puzzle on Utopia are the creatures that look like giant spiders. Not one of the old reports made mention of them. But in the not-so-distant past, something changed...Now these monstrous spiders are simply everywhere. They are multiplying like a virus, and attack us, and the gangs of local thugs. What worries Margret most of all is that the spiders are completely devoid of any instinct for self-preservation. They spot prey and immediately rush to attack. Even wounds do not stop them. They fight until they drop dead. As a leading specialist in alien fauna, Margret had never seen creatures this aggressive and indifferent to their own survival. Their behaviour is unnatural and frightening abnormal. Where did they come from? Ultimately, what strange processes were underway on this planet? 

Despite its name, the Spider doesn't particularly resemble a real life spider in either appearance or in the way it moves. Most noticeably, the game spider has 6 legs, instead of 8 like a real spider. Its mouthparts are also not even close to a real life spider's. Real spiders either have fangs that oppose each other like pincers or fangs that are parallel to each other and face down. The game Spider has 4 fangs, 2 pairs that oppose each other like a real spider, but when attacking, the Spider rears up and then fall down onto the player, which is would break its fangs, and only hit the player with the blunt edge. The rearing action is presumably mimicking the motion of a Tarantula, which has parallel fangs. The threat display is also not like that of a real spider; the in-game spider lifts its middle pair of legs into the air. The only spiders to lift their legs in the air is the spiders with parallel fangs. They lift their front legs to display their fangs and to allow them to fall on their prey with more force. In the game Spider, this force would go into breaking its jaw, and making it more difficult for the Spider to bite its target. However, it is also possible that they attack more with their legs than with their jaw, which is completely unlike a real spider.