The search for a specific "detailed story" regarding an " all weapons mod download link" suggests you might be looking for a narrative around the mod's creation or a specific mod pack that unlocks the game's arsenal. While Project I.G.I. (I'm Going In)
IGI 1, also known as I'm Going Insane 1, is a first-person shooter game developed by Innerloop Studios and published by Codemasters. The game was released in 2000 and follows the story of a secret agent who must infiltrate an enemy base to gather intelligence and complete various missions. The game was well-received by critics and players alike for its engaging gameplay, immersive storyline, and challenging level design. igi 1 all weapons mod download link