Ichi is an example of a game damaged by its achievements. Ichi is a simple puzzle game, a bouncing ball with bumpers and switches and such. It comes with 60 levels and proudly advertises that it has over 100,000 player-made levels.
To encourage you to make levels as a player, there are achievements for publishing 10 levels and for having 100 people play your levels. To encourage you to play others’ levels, there is an achievement for completing 100 levels, which you cannot do with the game’s built-in levels. There is a combined achievement to gain 1000 points; you can get 3 points on the built-in levels, but the other 820 come from 1 point per player-made level you play and 1 per player who plays your levels.
As a gamer, you can already work out what these incentives produce.
The player-made levels are filled with insta-complete “puzzles.” You start the puzzle, the ball flies into its target a few seconds later, and you do not even need to click. There is a mutually beneficial arrangement for achievement hunters, whereby you want lots of quick points and levels, while the level-designers want lots of quick points and plays. The original goal, generating lots of player-made levels and letting the cream rise to the top, would demand stronger tools than the game has to help that cream rise.
But there are some cute and interesting puzzles, and I got my 49 cents’ worth.