Here's our top five of the games so far:
5. Eight months pregnant and packing
Nur Suryani had to pray her baby would not kick every time she squeezed the trigger in the women's 10m air rifle event.
The 29-year-old Malaysian shooter was an unprecedented 34 weeks pregnant during the competition.
She missed out on the finals after shooting 392 out of her 400 targets, seven short of top qualifier Sylwia Bogacka of Poland.
And in another milestone - she was the first Malaysian woman to compete in shooting at the Olympics.
4. An unexpected star
Ruta Meilutyte set a European record with her first swim in the 100m breaststroke.
The Lithiuanian - just 15 years-old - followed it up by recording the fastest semi-final time, then heading off a strong challenge from American favourite and world champion Rebecca Soni to lead from start to finish in the final.
Almost anonymous heading into competition, Meilutyte is now an Olympic star with the promise of more gold on the horizon.
3. Almost perfect
Kim Rhode came agonisingly close to pulling off the impossible.
Her consolation prize was a gold medal and a tie for a world record.
The 33-year-old American took out the London trap shooting competition by hitting 99 out of 100 targets.
She hit 65 straight targets before her lone miss, which was met with sighs of disbelief from the spectator gallery.
Rhode shrugged it off with ease to hit all her remaining targets. Afterward, she had no explanation for why perfection evaded her.
"I just missed," she said.
2. 'Hail Mary'
Trailing 65-62 with the ball on their own baseline and three seconds left on the clock, the Australian Opals had little hope of winning their round robin match basketball game against France.
Under pressure from two defenders, guard Belinda Snell managed to advance the ball just short of the halfway line.
What came next was the one of the most spectacular shots in Olympic basketball history.
Snell released a two handed heave from her chest that flew 15 metres before bounding of the backboard and rattling through the net.
One French player screamed in anguish. Others stared at the ground in disbelief. The Opals hugged and jumped up and down.
Their happiness was short lived. They lost in overtime, the final score 74-70.
1. Shiwen wins
This incredible feat by a 16-year-old has made her more infamous, than famous. Unfairly to most observers.
Few casual sports fans had even heard of Ye Shiwen before the final of the 400m individual medley swimming final on the opening day of Olympic competition.
The shy Chinese teen changed that with one stunning gold medal-winning swim.
She beat her nearest rival Elizabeth Beisel by three seconds, knocked seven seconds off her own World Championship time from a year ago and smashed a world record by more than a second.
Perhaps most impressively, her final 50m freestyle leg time of 28.93 seconds was quicker than that of the men's gold medal winner Ryan Lochte.
Questions were immediately raised about whether Shiwen's dramatic and sudden improvement was aided by doping.
Olympic organisers and swimming's governing body leapt to her defence, saying she had undergone drug testing along with the rest of the Chinese team.
The swimmer ignored the drama in an understated post on her blog: "The first day's competition is finished. The score is satisfactory. Tomorrow, I still have the 200m and will continue to strive. Thank you for your support."
