Cornucopia bloodbath

A bloodbath at the Cornucopia almost always occurs at the very beginning of the Hunger Games, as most of the tributes compete for valuable weapons, food, and packs full of other supplies spread in and around the Cornucopia. Tributes always die at the bloodbath. Some common weapons in the Cornucopia are knives and spears. In most of the Games, there were backpacks with various items inside. Some examples may be weapons, medical supplies, or food/water. The ones closer to the Cornucopia held more valuable items, while the ones farthest away held less valuable items. The Gamemakers or the Capitol probably set it up this way for optimal entertainment value and quick deaths at the beginning of the game to keep audiences interested. In the end, the Cornucopia is often taken over by a group of tributes who fought in the bloodbath, usually the Career Tributes. It's usually located in the center of the arena.

Tactics
There are a variety of ways tributes approach the blood bath. Some tributes forgo the Cornucopia completely and try to put as much distance as they can between themselves and the armed tributes with weapons from the Cornucopia. This means they will get no supplies at all and will have to rely on the arena and their skills or perhaps a rich sponsor to give them some. Other tributes, including Katniss Everdeen, grab what they can from the outskirts of the cornucopia and run before things get too dangerous. This means they still get supplies, but the supplies they get may be meager or not the most wanted/valuable. Still, other tributes (mostly Careers, such as Marvel, Clove, and Cato) use the dash for supplies as an opportunity to kill as many tributes as possible while they are all together. This means they will get the most optimal supplies and perhaps extra, but they run the risk of getting killed. In the 74th Hunger Games, the Careers, possibly after the bloodbath was over, made camp by the Cornucopia. This allowed them to take any leftover supplies.

50th Hunger Games
In the 50th Hunger Games, 18 people were killed in the opening bloodbath, likely by the Careers.

74th Hunger Games
In the 74th Hunger Games, 11 people were killed in the opening bloodbath, mostly by Careers. Clove killed the boy from District 9, but the rest of the deaths are unknown.

75th Hunger Games
In the 75th Hunger Games, 8 people were killed in the opening bloodbath, likely by the careers. Finnick Odair killed the District 5 male, but the rest of the deaths are unknown.

Tributes dead in the 74th Hunger Games bloodbath
District 3 District 4 District 5 District 6 District 7 District 8 District 9 District 10
 * Girl
 * Boy
 * Boy
 * Both
 * Both
 * Boy
 * Both
 * Girl