If it’s at an Internet cafe where everyone is in attendance, I seriously strongly suggest “The Ship”. In my experience, probably the ultimate LAN game. Screen peeking allowed but not encouraged.

The game is effectively a game of assassin—but you have to upkeep your player’s needs (food/water/shower/bathroom/sleep). Your character needing to take a shit is stressful—very often you begin the process only to have your murderer pop open the door with a fire axe.

It used to have a “viral” gift copy thing on Steam where 1 purchased copy generated 2 gift copies and those copies generated 1 copy each. So in theory, you could only require 3 copies for 15 of you if that’s still active.