Early humans probably survived by hunting birds and land animals, and by fishing. This is because hunter-gatherer society was mostly about hunting, as there is not much to gather in winter and spring, but there are always some animals around to hunt.
Here is the list of primitive tools used for hunting:
1. A rock
This might sound silly, but there is a possibility that humans at some point threw rocks at smaller animals and birds in order to hunt them.
2. Throwing stick
Much like a rock, just its a stick which was thrown at birds and animals to hunt them.
3. Throwing stick with rock tied to end of it
So a combination of a rock and a stick to make greater impact. The idea is that stick is easier to throw while rock attached to it could make significant impact.
4. Bola
Bola is usually 3 rocks tied to 3 ropes, and all ropes are connected. Its meant to be thrown at target so it either stuns it on impact either ropes wrap around it and trap the target.
5. Spear
Now, everyone knows about spears. They were effective for hunting in groups. When many people throw spears at target, it basically guarantees a hit.
6. Bow and arrow
This tool was very effective at hunting birds, so it quickly became popular.
7. Fishing rod
This made it possible to harvest fish from rivers.
8. Fishing spear
Now, I cant really imagine that fishing spear had some great success, but some sources say it was used.
9. Hand axe, tomahawk
Basically, it worked similar to throwing stick with a rock, its just that axe made greater impact.
10. Sling shot
This tool was used to hunt birds. It was simple enough and easy to carry.
11. Sling
This tool was probably used to hunt at some point.
Other tools were mostly similar to these, just under different names.