I have been looking for the sans serif font used in the game - Among us' chatbox, task bar, home page & settings. 

Looks very similar to Arial round, Varela round. But haven't been able to find the exact font on any other forums. 

Thanks in advance! 

Since the only difference I can see with Arial is the tail of |a|, I think it is just plain Arial, and the roundness is due to the outline applied to the text (looking closely, you can see that even the black text has a white stroke applied to it).