Ratfolk

Your ratfolk character has a number of traits in common with all other ratfolk. Ability Score Increase Your Dexterity score increases by 2.
Darkvision You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.
Underfoot You can move through the space of any creature that is of a size larger than yours.
Nimble Escape You can take the Disengage or Hide action as a bonus action on each of your turns.
Language You can speak, read, and write Common and speak Ratfolk. Ratfolk is a verbal language consisting of chitters and other rat-like noises. There is no written component of Ratfolk.
Size Ratfolk average about 3 feet tall and weigh about 60 pounds. Your size is Small.
Speed Your base walking speed is 25 feet
Burrowrat Burrowrats live in complex subterranean networks, comprised of burrows and tunnels. They are almost always expanding their burrows, so they are adept at navigating earth, and their life underground gives them more sensitive vision in the dark.
Ability Score Increase Your Strength score increases by 1.
Superior Darkvision Your darkvision has a radius of 120 feet.
Earth Walk You can move across difficult terrain made of earth without expending extra movement.
Tight Tunneler You suffer no penalties due to squeezing into a smaller space. Additionally, you have advantage on all Dexterity checks and saving throws against being grappled.
Sewerat Sewerats are settlement parasites, living in the sewers or dumps of other races. They live off of waste and refuse, though they are occasionally known to steal food from homes in the city.
Ability Score Increase Your Constitution score increases by 1.
Sewer Resilience You have advantage on saving throws against poison, and you have resistance against poison damage.
Wildrat Wildrats, in contrast to Burrowrats, live above ground. They most commonly inhabit forests, but have been found in almost all biomes. Their vulnerability to predators forces them to be as stealthy as possible, and they have perfected communication with fellow animals to survive.
Ability Score Increase Your Wisdom score increases by 1.
Beastspeech Through sounds and gestures, you can communicate simple ideas with Small or smaller beasts.
Mask of the Wild You can attempt to hide even when you are only lightly obscured by foliage, heavy rain, falling snow, mist, and other natural phenomena.