Hi
I consider it an achievement, if I can find a word, and I am the only player to have found it.
Played by 1 player.
Of course, it is easy in the first few seconds of a new game.
It is a bit tougher, to only consider it an achievement after:
* I have found the big word ( using all letters )
* I have found the 'best' count of words.
It usually happens with somewhat technical words.
In my case often related to electronics or mathematics.
Michael