The following page contains the description of unlocking bronze trophy Good Samaritan in Shadow of the Tomb Raider. The achievement as awarded for completing 8 side missions.
Side missions are encountered in some selected locations. Their availability can be checked by look at the left upper corner of the map screen. See the example above - there is one side mission available in the Kuwaq Yaku area.
Not all side missions are available immediately. You may be required to reach a certain point of the main storyline or find the quest giver (either on your own or by asking the local NPCs).
The side quest givers are marked with the same icon as seen on the location map (see example on the picture). For the trophy you have to complete 8 missions of your choice. There are more of them in the game (and as many as 10 in the Hidden City alone). Have a look at the Side missions chapter of our guide - you will find information about the quest givers and detailed walkthroughs.