There are number of eggs in the map (in this case 20) which can be taken by both teams and have to be brought to the nests of the teams. After all 20 eggs have been taken 3 new spawn randomly. Everytime when one of the 3 eggs is captured, a new one spawns, so there are always 3 eggs in the map till map ends. There can be taken up to 120 eggs per team atm. The team with the most eggs in the end wins.
Like I said in the beginning the main idea is that it can be overtaken into other maps.

Zer0Cool