If you can tolerate some old-game grit, Sniper Elite 1 offers something the sequels lost:
It is also fascinating to see the DNA of the series here. Every mechanic you love—the tagging, the traps, the sound masking, the authentic rifles—started in this rough, brilliant PS2/PC title.
If you have a PC (available on Steam or GOG) or an original Xbox, do yourself a favor. Grab it, crank the difficulty to "Sniper Elite," and learn what it really means to hold your breath before pulling the trigger.