With thanks to Owl for reminding me about this classic Flash gem of a turn-based strategy game created by Brian Cable. When I first came across the game in 2004, I held off on posting it to the site and instead contacted Brian asking if I could help him update the graphics since they look a bit rough when compared to its sparkling gameplay. He agreed but I dropped the ball, and the project languished. Fast-forward 4 years and the game is still excellent and worth mentioning, and it even earned Brian 3rd place in a recent Microsoft game design competition.
Proximity is somewhat like a cross between Risk and Go. It is a surprisingly simple game to learn and it takes about 5 minutes to play. You can play against the computer, or against a friend at the same computer. No multiplayer version of the game yet exists, unfortunately.
Two identical sets of tiles (one red, one blue) are made up of random numbers from 1-20. Both sets are equal in size to the number of turns you have for the board. Each turn, a tile from your respective set is chosen at random and removed from those remaining. Your turn ends when you place the tile onto any free space of the game board. If the number on the tile is larger than the enemy tile(s) you place it adjacent to, the color of those tiles are turned into your color, and the total sum of all your tiles is updated accordingly. The (default) objective is to have the largest sum at the end of the game, though this can be changed to the most territories instead in Game Setup.
Quickstart gets you into a game quickly, with the computer set to "beginner". If you want a more significant challenge, enter setup and change the difficulty: beginner, skilled, expert, or human. You can even set both players to computer AI and sit back and watch as they play.
Proximity is a brilliant casual game design by Brian Cable, and if you haven't yet played this excellent game, you're in for a treat.