Natural Selection 2 is a strategic shooting game. It was launched on 31 Oct, 2012, but it has a good graphics.Overall Reviews are very positive.
This guides aims to concisely explain how to get the 4 achievements from the tutorials. (that i know of, as far as i know there is 1 for each tutorial)
Open the tutorial and go through it until you go to Landing pad, once you get there immediately jump off, repeat this until you get the achievement.
Open the tutorial and go through it until you’re asked to parasite a marine, swich to parasite (otherwise you won’t be able to go into the room you need) then run towards the marine WITHOUT parasiting him, do this until you get the achievement (biting the marine is ok, you can’t kill him).
Marine commander tutorial
Open the tutorial and go through it until you’re tasked with scanning the alien hive, instead of scanning it scan literaly anywhere else until you get the achievement.
Alien commander tutorial
This used to be the hardest achievement but it was later made easier.
As soon as you start you have to watch the gorge (it starts as a skulk and evolves to gorge) and do nothing else until you get the achievement. This is by far the best achievement too.