You can only change one letter, all words must be in the dictionary, you can also ADD a letter to the beginning or end of a word if it makes sense (note you can only add it to the very beginning or end, not in the middle of the word)
You can also take away a letter from one word if the result is also actually a word.
Start with -
The tired man walked downstairs to watch the hockey game.
GOGOGOGOGOGO.
