ToME: the Tales of Maj'Eyal

To unlock this achievement, the player will need to achieve level 25, without bumping into a wall / other impassable object.

By bumping I mean: either, by pressing a movement key in a direction you can't move to, or be slammed into an obstacle by a knockback attack

There's been a few complaints of people that a turn passes when you bump into a wall.
I don't complain. I say, make it an achievement to avoid it, as a roguelike should be played with care after all.

I would call it "Careful Typist" since the "type" is on the player's keyboard. This is for people who want to wear out the "5" key on the number pad I think.