On the higher difficulty settings, the game demands mastery. You must estimate distance to adjust your scope elevation, judge wind direction by observing drifting smoke or cloth, and lead moving targets. It transforms the gameplay from a run-and-gun shooter into a methodical puzzle game where the pieces are moving soldiers and the solution is a single, well-placed round.
To run this game in high quality, you do not need a gaming monster. Here are the recommended specs for the 2012 original: