Braid has a total of 7 worlds, starting with World 2 (these is no World 1
) and ending with World 6
and then the unnamed 'Final World'.
You will unlock this easy achievement by simply finishing the first level in the game, World 2
. This World is pretty much a tutorial (and hence very simple with no complex puzzles), so shouldn't pose too much of a challenge.
Attached is a walkthrough of World 2 which I made.
See my full game walkthrough playlist here (include how to get all puzzle pieces):http://www.youtube.com/view_play_list?p=57DB68EC167AA246