Inspiring equal parts hate and admiration, Defuse consists of a series of increasingly difficult math and logic puzzles that can be solved using the mouse. What happens if you fail? Well, hey, the important thing is that you can retry without penalty. But if you can complete the puzzle in each room and make it to the finale, you will receive the ultimate reward... possibly.

Atomic Cicada brings us another original puzzle game, with a light math flavor, and an atmosphere somewhere between "excessively subdued and calming" and "horror film waiting to happen". Whether the game is trying to imply an ominous black cloud puzzle OF DOOM! or just a strange twisting of "relax" spelled backwards is completely up to you.

Finally, a game that allows you cheer that most cherished of subjects: math. With a shiny new facelift, exploding tiles, and the ability to rotate the board 90 degrees, Drop Lift v2.0 is a major upgrade to the original. Link together chains of numbers that add up to nine in this awesome block-dropping puzzler.

A gorgeous puzzle game with an impeccable user interface, Minim sets the standard for browser-based casual games. Minimize molecules to nothingness by combining atoms with digits on them, according to a few simple rules. Despite the references to chemistry and some light math, Minim isn't an educational game. It's more like a comforting hug followed by a knuckle sandwich.

Zerosum is an intense variation on match-3 puzzles, with strict policies on winning and losing but vast opportunities for strategy. Easy to learn, hard to master. Make matches by adding adjacent numbers together, but make sure you don't run out of digits to replace them! It's brain candy, once you get into it, like defusing a bomb constructed by an six-year-old arch-villain.

DropSum is an elegant puzzle game by Nick Harper, who describes it as a cross between Tetris and Sudoku. Burst bubbles and form complicated chain reactions by forming groups that add up to 9. If you ever find yourself yearning to lay down some damage with the power of sums, this is as good as it gets.

Play as a row in a database where your objective is to fight the other rows to decrease their numbers and increase your own. It's a numbers game, pure and simple, and by not pretending to be anything else, mySQLgame has managed to take the ubiquitous browser-based MMO and distill it down to the very essence of the genre.

dRive is quite possibly the first calculus-themed game to get a review on this site, but don't go fleeing for the high country quite yet; you don't need to understand the math to play the game. At its core, dRive is a simple "catch the falling objects" game, but the unusual, calculus-based method of controlling three games at once turns dRive into an innovative, fascinating game.

The numbers are falling! Fortunately, you've got the fundamental theorem of arithmetic on your side! In Prime Shooter, a math game of prime numbers created by Philip Dorrell, destroy prime numbers directly, or reduce composite numbers by dividing them by prime factors less than 20. Each number you destroy scores you one point, and the numbers get larger and fall faster as your score goes up.

File this one under brain training games: Math Mountain is an addictive arithmetic game wherein you climb a mountain, competing against another person or the computer, by answering math questions correctly. If you're not very good at arithmetic, Math Mountain is a fun way to practice; if you're already good, then why not give your brain some exercise?