Crashlands consists of three practically infinitely-large, procedurally-generated Biomes. Each has its own cast of Creatures, Resources, and sentient beings for you to dominate.
The biomes of Crashlands are not actually infinite. Each biome is 65,536 (216) tiles wide and tall, giving it a total area of 4,294,967,296 (232) tiles. That is big. If Flux is assumed to be 5 feet tall, and each tile is as tall as Flux and 1.5 times as wide, each tile has an area of about 35 square feet (3.3 square meters). Each biome is thus about 62 miles (100 km) tall and 87 miles (140 km) wide, giving it an area of about 5,400 square miles (14,000 square km). The entire area of Crashlands, with its three biomes, is about 16,000 square miles (42,000 square km), about the same size as the Netherlands. (see 20:48 in [1])
Savanna
See Savanna
Bawg
See Bawg
Tundra
See Tundra