A digital puff of marijuana, for example, temporarily slows the action of the game like a sports replay. Taking an Ecstasy tablet creates a mellow atmosphere that can pacify aggressive foes. The use of crack momentarily makes the player a marksman: a "crack" shot.
But using each drug also leads to addiction, which can lead to blackouts that cost the player inventory and to demotions or even expulsion from the police force, which halts progress in the game. In measured doses, the substances can make a tough challenge easier, but the makers of the game say it is possible to play without using the drugs at all.
The New York Times > Technology > Circuits > Where a Puff of Marijuana Is the Ultimate Power-Up
