Raildriver - Red Faction
Mace of Aevar Stone-Singer (mace with frost enchantment) - Morrowind
Fallout - still deciding
prefer Maces - Oblivion and Morrowind
Redneck Rampage - RipSaw - nothing else in the same league
Portal - Portal gun. 
Halo 2 - Scarab Gun
Metroid + Primes (All games) - Samus’s Cannon
Since the charge beam isent the default all powers that go with it are included 
the sheep from worms
Gravity Gun- Half Life 2.
+1