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First first-person shooter videogame (FPS) to feature a sniper rifle

First first-person shooter videogame (FPS) to feature a sniper rifle
Who
Quake Team Fortress
What
First
Where
Not Applicable
When
August 1996

Pre-dating the sniper rifle in Goldeneye 007 (Rare) by a full year, the Quake Team Fortress mod introduced gamers to a sniper class when it released in Aug 1996. A later version added "locational damage" to essentially differentiate between head and body shots.