I have argued before that seeing a game’s achievements tells you a bit about how the developers expect you to play and therefore whether you are likely to enjoy their game design. Even without explicit categories, you can see that a game awards achievements for beating the game, for 100% completion, for beating bosses with one hand tied behind your back, for exploring all the corners of the game, for killing 10 million rats, etc. It says something about the game or the developers if there are hundreds of achievements or they skew towards one category.
In Prime World: Defenders, 46/80 achievements are for defeating each of 23 maps with one of two hands tied behind your back; you will get some of them on accident, others take some relatively precise work like beating them with exactly 1 life left.
Two of the achievements I had not through are power of 10 achievements. If you scroll down to the least achieved achievements, you see “build 10,000 towers” and “win 500 games.” Does this game expect you to grind and reward you for it? Look at the math in the title. A game with 23 maps has an achievement for winning 500 games. Even with procedurally generated content, that is a LOT of times per map.
: Zubon