7 Days to Die

From what I can gather you get points in this game two basic ways. Leveling up (5 points per level) and killing zombies (1 point per level)
NOTE : Dying causes you to lose 10 points and should be avoided at all costs. Because of this I refused to explore any military bases as they have mines that are hard to see sometimes and if you trip one its almost always instant death.

From this I just tried to always be doing things that improved skills (crafting, mining, constructing) so as to level up as fast as possible while building up a defensible position so that on the seventh night I could easily survive. I ended up being level 68-70 when it popped for me. Not a super hard achievement and one that if you just keep playing will eventually get, but if you wanted to focus on it the main thing is always be crafting some items. have extra wood, make spikes as your traveling, Have extra forged iron, make extra tools. plant rows of trees from the seeds you get from cutting down trees and if you have an hour of daylight left before night. cut and replant them then use the wood to make things. Everything slowly pushes you towards your goal, at the least almost anything you make too much of can be sold to the trader which helps your barter skill which in turn pushes you closer to the next level and another 5 points.

Hope this helps. God bless.