First of all, cool new forum.
Anyway, as a human, when in close quarters with aliens, which will often happen in the game, you will find it necessary to dodge and jump and all that.
This is alien evasion at close quarters and is a great skill to learn, for example gunning Tyrants and Dragoons.
This may allow you to evade their mandibles of destruction long enough to kill them. Confusion is the best weapon you have, often they are chasing you, and so you can lea them on a merry dance, jumping out the way and moving to the side.
THIS, is how to have no hitbox.
To Evade Dretches:
Good Dretchers will use the headchomp-footchomp technique to kill you, thereforeyou need to get out of the way of the headchomp (run to the side, or dodge if you are pro, I aint) then turn around and start shooting at the Dretch. By this time they will have lost momentum and will be slower, and easier to shoot, they will be going in for another headchomp, so just keep on evading them.
If they are swarming you, then run around, doing random turns, and fast turns, and you will see a long snaking line of dretches following your trail, they will be closely packed together, enabling you to fire upon them.
Sometimes try running towards them, then turning away, confuse them as much as you can.
Basilisks:
Basilisks are harder to avoid, because of their grab, but if you can sprint past them, then turn round, a juicy target awaits you. If they grab you, DONT GIVE UP! Just try to get out of their grip, turning, jumping, and then hope they take their eye off the bal, and accidentally let you go.
Another fun thing to do is to get a few Basilisks, then a a human with a blaster, try to run a gauntlet (works best in Tremor), its just too much fun.
Marauders:
For Marauders, simpy try to keep awy fro where they are (but dont run away, that isnt the point) and with ou gun shoot them where they land, just run backwards away from them as they bounce around.
Dragoons:
Dragoons almost always enter a fight with a pounce, this very often decides th winner of the fight. Three words: DODGE THAT POUNCE. Run to the side of them. Then once they land, run around them to their back and astart shooting them, keep running away from them, turning sharply to try and throw them off, make sure that they cant run away by keeping close to them, and listen for the scream, at that, they will try to run away, but DoNT LET THEM!
Tyrants:
When they attack you, try to get out of their way and keep moving out their way when they try to see you.
An attack on a tyrant may last for long with a lesser gun, but you will steadily drain them of health.
The Golden Rule of Evading Aliens is to KEEP MOVING.