Kairos

Kairos is a map that was added in 0.0.19P, that version being 16. Orginally known as Greyblock (also known as known as Map_Greyblock_(version number), it was revamped As of 0.2.0P with entirely new art and birds.

This was also the first map availible for play when online multiplayer map released

This map has a totally unique layout, and is reportedly an effort to create a new default map, one to replace Proving Grounds. It is also the second map to introduce a boundary that constrains the total area the Giant can move around akin to proving grounds. (the total area is quite large, only preventing players with very large playspaces from walking to the back of the stage and overwhelming the Warrior. It can also be turned on/off in game settings, the first map to have this feature).

In 0.0.19 Map_Greyblock_15 was put in, and the only differences between 15 and 16, is that 16 has a gloomier sky, different block placements and the railing looks more primitive. Greyblock_20 brought some more minor changes, and the Kairos revamp changed everything, adding water, a background, and updating the look significantly