Arithmagic is an engaging mental math game that’s suitable for students who need additional help or extra practice with arithmetic and fluency. The game has several mechanics that make doing arithmetic fun!
All in Arithmetic
New York Times' Digits - The Wordle of Math Games
Although the beta is no longer available, read about what the developers at NYT were cooking with their recent math game that rivals Wordle.
Funexpected Math - A Charming PreK-2 Math Game - Guide for Parents and Teachers
PreK - 2 students will enjoy the myriad of fun and engaging games and activities in Funexpected Math. There is a suite of arithmetic, geometry, number sense, counting, and logic games that are constantly updated. The developers regularly update the game with new quests and activities!
The Counting Kingdom Review
The Counting Kingdom is an arithmetic game that’s suitable for practicing fluency skills in the early elementary grades. Cast spells and use magic potions to do arithmetic and save the kingdom from monsters!