Call of Pripyat is an immersive survival-horror shooter video game. Like in previous games, the choices in Call of Pripyat matter too and depending on your character disposition, you can achieve a bad or a good ending.
The good ending shows the effect of your benevolence. You find out about the outcomes of the characters that were kept alive or their quests were completed. Upon completing every side quest, siding with different factions or not siding with them at all will have some sort of effect on good ending of Call of Pripyat.
The bad ending, like the good one, shows the effect of your choices and decisions, but instead, it shows what a malevolent character would achieve if they let key characters die and decided on more morally gray or dark decisions on some main and side quests. Check the videos out, and get out of here Stalker!