Ubersoldier II (Steam key/Region free).

http://store.steampowered.com/app/281410/
A tightly knit group of SS generals and officers, involved in the most heinous
and dark deeds, is seeking a way to save the remnants of the Third Empire. They
have conspired to move the leaders of the Reich, together with precious resources
and classified equipment, to a remote hideout in the Tibetan mountains.

Features:

Full multiplayer through LAN and Internet with up to 16 players.

21 weapons, including look-alikes of “Luger Parabellum”, “Tommy Gun”, MG-42, BAR and Panzerschreck.

Dozens of types of brutal enemies, including armor valkyries and telekinetic mutants.

RPG features, including special abilities and accumulation of experience.