Aside from humans, there are many other forms of sentient life in the vast emptiness of space.
Treat them with caution, as not all may be as they seem.
Hostile
Xenomorphs - The scourge of spessmens everywhere, they generally kill or capture unlucky humans and monkeys on sight. You are expected to do the same.
Slimes - They feed off of the nervous systems of other sentient beings, absorbing their electricity for nourishment. Gooey.
Constructs - Loyal minions to the Cult of Nar'Sie, they serve their unholy masters to cause death and destruction.
Statues - Made by the Wizard's spell Flesh to Stone. With the Staff of Animation their bloodlust is awakened and they start to hunt people, but can move only when they're not seen by anyone. They cannot be killed (or atleast take A LOT of damage to die). Don't blink!
Shadowling - Only found when this game mode is active works like the Shadowpoeple but have multiple stages and abilities and are not hurt by ligth until they hatch
Neutral
Cyborgs - The latest, and greatest invention of Robotics experts at Nanotrasen, they are normally loyal to the AI. Who the AI is loyal to, however...
Monkeys - Sapajus robustus or the robust tufted capuchin. Nanotrasen usually ships a large number of these annoying cute creatures to the station, so they can be used in horrific medical experiments, virus testing, and other purposes. Research in matter compaction and rearrangement have resulted in the Monkey Cube, a molded, powdery cube that when exposed to water, results in a monkey. Sometimes known to use tools laying about.
Shades - The spirit of an unlucky crewmember, bound to serve the one who used the Soul Shard.