Grimrock

Perform 500 missile or throwing weapon attacks.

I tried 500 with rocks and nothing happened. Does this not include rocks?

Thrown from char hand or mouse cursor?

Throwing from character .

I tried a wall, with all 4 throwing shuriken, knives, darts and rocks. (I might try 150 more without rocks)

Then I thought it might require hits on a creature so I did 600 with rocks on turtles and zombies. (It does not take as long as I thought it might)

Oddly enough, you also can get the achievement by playing the game with actually throwing rocks or shooting arrows and so to enemies... I garantee it !

1076 rocks thrown from one character at nme's and no achievement. Maybe its weapons that stick in nme.

Or try my method... Manufacturer's garantee...

Perhaps you need to hit monsters too, not just toss or shoot stuff into thin air.

I did shoot them the second time, and the third I shot them with only one character instead of four. (the first I did more knives and throwing stars at a wall)

Probably a check on the number of creatures/levels, or missile skill, or has to be not rocks and a creature.

Using anything other than rocks would be tedious if you don't want to play a whole game as an archer.

Anyway, hope it saves someone from trying. If you really want it, I would just start a new game and use a bow. The sling shot might work and let you pick up ammo, but I don't think I have any more in me, lol.

Triggered l8r in another game not using many missiles, weird one. Says 2nd of November!, maybe it just took a while to show up.