the first time i played this game i putted it in easy because i believed it was going to be a bit difficult, but it was very, very easy, if you get trapped in some situation, try easy difficult (if you are using this, try to go slow and not be a beserk). and dont play werivar mod first, a lot of places are diferent and you will get killed very easily if you dont know the game, but if you know it, go on, is great
when you got something new, click on it in your inventory and move it over all your items to see if there is a new combination, but if you find one, continue checking all your inventory, sometimes you will find something better
Alien: The best is run around monsters attacking with your claws ant calculate the distance to evade the crash with them (this is very usefull against mobs), when you get able to lay eggs, get 5 (or was 10?) firewoods to make a nest, put it in swamp (like gorge) and lay your beatifull and deadly babies, they are sooooo cuuuuute! The blue alien is pretty usefull to clean areas, because his second stance (use right click) is the one of "search and destroy", he will go random everywhere and kill what it see. By the other way, the brown alien is awesome like a guard, with you or your base, use him to kill boss, just make him follow you, go to the boss and see the onslaught, but to help them, use the acid spit to "frezze" the enemy
Human: if you do the first " " you will get the peble shotgun, not very great damage, but can trow away the aliens. If you arent good chasing items, maybe you will like to kill the hermit and get the radio, but i think is best give him the pistol, he got a great aim, unlimited ammo, and can be healed (he will say "im hurt" or something like that, "give me a medipack/healing plant") and you can make him guard a place or follow you (right click) so use him. if you find the mining field, you will need to save and go with the hermit, if he is killed or he go away, load and make him guard a place, maybe a safe one in other area. Look for googles, a lighter and a glass marble, you will need them, and later go to the desert (in the evening) and if you are lucky, you will get a light diode and the night will cool down your tº. If you want to continue looking, make a Nightvision googles with the light diode and the googles, and look for other light diode, it will be your aim laser or your laser pistol. The sand is very usefull too.
Android: maybe the same that human, exept for the hermit, just kill him , but the shotgun will be very usefull while you look for batteries or something, specially in desert, try to evade all the robots, because they will drain your energy. The best place is maybe the ship graveyard, here you will find all what you need.
Psionic: The way to get items is not only the two giant robots, if you get the second token, the token of life, you will be able to carry items with the combination of "the token of strenght" so try the first tip. In order, the places to get tokens are the ship graveyard, the eden and the mining fields. The best place for psionic is maybe the eden, your life essences will grow like... a plague? and is not only that... .
Play the alien if you are fast with the keyboard
Play the human/android if you got great aim and good eye
Play the psionic if you got a combination of all, but not enought to master the others
P.S: I remember i posted some of this hints, but this is just like a collab