I think achievements, when done well, can do the following (not necessarily specific to Civ):-
1) Allow you to compare your progress with a friend, and see "where they've got to";
2) Act as an unofficial tutorial, pointing new players towards beneficial actions;
3) Encourage you to try a different or more challenging playstyle (OCC, for instance) that you might not have thought of;
4) Act as recognition/bragging rights for having done the extra challenge in (3).
They're hardly vital, but I think they're quite fun. For instance, in Half-Life 2: Episode 2, there's one for lugging a garden gnome through most of the game and launching it into space.
I can see no reason why they are necessarily a bi-product of FPS games. The above can apply equally to any genre.
1) Allow you to compare your progress with a friend, and see "where they've got to";
2) Act as an unofficial tutorial, pointing new players towards beneficial actions;
3) Encourage you to try a different or more challenging playstyle (OCC, for instance) that you might not have thought of;
4) Act as recognition/bragging rights for having done the extra challenge in (3).
They're hardly vital, but I think they're quite fun. For instance, in Half-Life 2: Episode 2, there's one for lugging a garden gnome through most of the game and launching it into space.
I can see no reason why they are necessarily a bi-product of FPS games. The above can apply equally to any genre.