In this first event, the Green Knight entered a gathering abruptly and was greeted by King Arthur and boldly offered him to join him for dinner.
"Sir you are welcome in this place... I beg you, and join us for dinner And whatever you seek we will gladly see to" (Line 34-37).
Sir Gawain is offering to play the Green Knights "game" because none of the noble men wanted to. Then he offeres to give him a gift.
“By heaven, sir, your request is strange; But since you have come here for folly, you may as well find it. I know no one here who’s aghast of your great words. Give me your gisarme, then, for the love of God, And gladly I’ll grant you the gift you have asked to be given” (Lines 101-105).
“Look that you go, Sir Gawain, as good as your word, And seek till you find me, as loyally, my friend, As you’ve sworn in this hall to do, in the hearing of the knights. Come to the Green Chapel, I charge you, and take A stroke the same as you’ve given, for well you deserve…” (Lines 172-176)
The green knight tells him a year and a day from now. He then heads out on a journey.
He stops at the castle and is let in by the king. The king offered him great hospitality.
“No more than they knew what country it was he came from. What then? The King and Gawain there Laugh at the thing and grin; And yet, it was an affair Most marvelous to men.” (Lines 185-190)
He plays the "game" with the king. The king goes out and kisses the wife. She doubted his knightly worth.
“So he listened in silence and suffered the lady to speak, And she pressed the sash upon him and begged him to take it, And Gawain did, and she gave him the gift with great pleasure And begged him, for her sake, to say not a word...And now a third time she Leaned down and kissed her man” (Lines 231-240).
“Since now you’re confessed so clean, acknowledging sins and bearing the plain penance of my point; I consider you polished as white and as perfectly clean...Remember our struggle here; recall to your mind This rich token. Remember the Green Chapel” (Lines 368- 376).
The green knight tells Sir Gawain the morals of his games.