
We all know that office work is just as much about milking minutes off the clock as it is about anything else. The best way I've found to shave off the 15 minutes til your next break are web games.
There are a few things that are important to consider when playing games at work.
First: The game should be relatively stress-free. After all you don't want to scream "FUCK!" in a crowded office after your commando jumps into a fiery pit.
Second: The game must be easily abandoned. This is less important if your boss doesn't use or know about tabs in Firefox. For most purposes though, it's important not to get wrapped up in anything that takes more than 10 minutes.
Third: The mouse should be the primary controller. Anything that requires an E-Honda like mashing of the mouse buttons is a dead give away, as no office programs take advantage of this skill. Also you won't have to make the incriminating grab for your mouse when Lumberg rounds the corner
Finally: The game should be non-offensive. This is purely a just in case kind of measure. Getting caught, "Stealing company time" is bad enough, but it's even worse if the game's objective is to decapitate big breasted women while they fuck horses.
Here are five web games that fit this criteria and will help your day suck a little less.
5. Attack of the Buggles
http://www.casualcollective.com/games/AotB/
Most of the games on www.casualcollective.com are just a little too involved for wasting office time. But, this game in particular is covert enough not to raise any eyebrows. Simply use the mouse to move your buggle over the squares, while avoiding the new buggles that spawn when you do. The blocks start out at 10 points each, but are worth less the longer you wait. Beware though, the game makes a loud roar when you load it so it's best to mute your sound before playing

4. Totem Destroyer
http://armorgames.com/files/games/totem-destroyer-1871.swf
Save the golden idol from falling to the ground by removing one block at a time from the tower upon which it sits. The game starts out slow, but the physics of dropping the idol become more complicated as the towers start to wobble when you remove key blocks.

3. Bowman 2
http://www.addictinggames.com/D78AQSAKQLQWI9/2817.swf
A throw back to playing gorillas in DOS. Determine the angle and velocity with which to send your arrow flying towards your opponent. Several other modes mix up the gameplay a bit, but the goal is always the same; skewer something with an arrow.

2. The Eyeballing Game
http://www.woodgears.ca/eyeball
Recently discovered, this game tests your ability to correctly transform shapes/lines. A bit shallow, but the fun is in improving your score.

1. Dinorun
http://www.pixeljam.com/dinorun/
An Atari lookalike, this game oozes 8-bit cool. Run to the right, away from the armageddon gaining on your heels, while hitching rides from birds and collecting eggs and bones. With several different levels, and a boat load of achievements, the game is fairly deep. However, each level takes only a few minutes to complete. The game requires only 3 buttons to play, freeing up your other hand to quickly exit if need be.

Good luck, with the games and your mind numbing job.
