Think you've got what it takes to be an Olympic pole-vaulting champion? You might think twice after you play this two-player versus game from the creator of QWOP and GIRP. Try to score against your buddy's goal by mastering the surprisingly tricky intricacies of pole-vaulting in this hilarious and challenging little physics action game.

Ready for some brawling? Superfighters from MythoLogic Interactive is a single-screen single-player or 2-player versus fighting game replete with weapons, tactical maneuvers, and chunky pixel art your eyes will adore. It's a game where little dudes shoot, stab, burn, kick, shoot (again) and trick each other until they pass out from non-livingness, and once that round is over, you get to do it all over again!

A local 2-player versus game in which one player plays the man who builds barricades and finds elixirs during the day and the other plays the wolf who tears down barricades and eats people. It's a race for points over 3 days and nights, and then the roles switch. The player with the most points after 2 rounds wins. Grab a friend, or another personality, to play a game.

Nitrome has done it again! We've guided the little blue piece of protoplasm test subject through two incredibly enjoyable series of experiments. Now, however, it (and you) faces its greatest opponent yet: a person sitting next to you at the keyboard! Yes, it's Green vs. Blue in Test Subject Arena

Sean Cooper's new online simulation of the classic game of marbles. Aim and shoot a white marble, attempting to knock red marbles out of the circle. The lack of AI opponents or online multiplayer is a flaw, but overall it's a fine iteration of a very niche genre.

CastleWars 2 is an unassumingly captivating turn-based strategy game that pits castle against castle, wall against wall, and decks of randomly selected cards against decks of randomly selected cards. Take turns with a computer player or a real human being as you draw from your pool of resources to play action cards that build your tower to the sky or crumble your opponent's castle to the ground.

Our 3rd Casual Gameplay Design Competition received a ton of great submissions from a number of talented game designers. Taking first place in that competition was Wouter Visser's Gimme Friction Baby, a strikingly simple arcade-style game of skill involving a moving turret and expanding orbs. Now, just over two years later, Bitforge has come and updated the game for iPhone and iPod Touch users. Orbital is the new incarnation of Gimme Friction Baby, adding some slick visuals, tweaking the physics a bit, and adding a new gameplay mode along with multiplayer support!

If you're a big fan of sports games and have been dying for something to play at work on break, this is it. Even if you aren't really that into sports games, Crunchball 3000 boasts quite a bit of accessibility. So gear up, warm up, stretch out, and pay no mind to the 6'4", 320 lb behemoth giving you the evil eye. Scars build character and you ain't got time to be scared. Are you ready for some Crunchball?

A dice game of luck and strategy, race against the computer (or a friend) to 10,000 points. Earn points by rolling 1's and 5's, or by rolling 3 or more of a kind, or several other special configurations worth big points. Also known under a variety of different names, Zilch is definitely one of those games that's "easy to learn, hard to master."

A marble placement, turn-based strategy game. The goal is to be the first player to place five marbles in a row. The rows can be vertical, horizontal, or diagonal. The game is a bit like Connect Four, but with a twist. Pentago is an award-winning board game from Sweden, and this Flash version allows you to play in a browser.

Attak is the game I've wanted to play since I was fourteen years old. If you ever tried to raise your power level while on the bus, and had an invisible energy duel with your buddy during class, you know what I'm talking about. Every single game ever made about Dragon Ball Z has been a lame cash-in, a modification of fighting mechanics or RPG mechanics, hobbled Frankensteins that never really grasped the dynamic of Power Level 1,000,000. Today, the brothers at JohnnyTwoShoes have delivered with sonic, accessible Flash.

Chess is a classic, easy to learn and hard to master. What would happen if chess was bitten by a zombie and then rose again as an undead shadow of its former self? You'd get Tomb Chess, an intriguing variation on the dynamic, where two ghoulish armies battle across a graveyard.

Castlewars is a Flash turn-based card battle against either a computer or live opponent where you try to build your castle up to 100 or blast your opponent's to rubble. The game is quick and easy to learn, and can be played against a friend anywhere in the world.

Quadradius is an online, multiplayer, turn-based Flash game that takes the skeleton of the board game checkers, and pumps it up with a massive list of power-ups and new strategies that turns the game into an addictive and very compelling new concept. In fact, calling it checkers is an oversimplification that does not do it any justice.

Trick Hoops is simple game of making hoop shots with a basketball. It is a multiplayer game that can be played one-on-one with a friend over the Web. The mechanic is a simple one and won't take long to become familiar with how to do it. Perfecting shots, however, is another matter entirely and that's what makes this game so much fun.

It isn't often that I come across an addictive browser-based Flash game with which you can play against a friend over the Web. I was pleasantly surprised to find the latest game from Gamesheep is just that kind of game. Crystal Clear is a simple casual game with gameplay similar to the classic game of Lines, and yet with some subtle differences that turn the classic into a compelling two-player battle.

Balls and Walls is an absolutely fantastic game designed for the equally brilliant British band Athlete by Mortalbug and Quiet Phil. The game is extremely simplistic and very easy to get the hang of as soon as you start playing. Multiplayer mode is where the game's real beauty lies.

Manuel Fallmann's latest offering on his MINDistortion site is a turn-based strategy game against the CPU, or a human opponent at the same computer. The object of Quarkz is to be the first player to reach the number of points designated as the victory condition by adding particles to the...