Resident Evil Umbrella Chronicles is classic lightgun game; tough as nails but if you like a challenge it's worth playing.
Darkside Chronicles is a bit easier, the shaky cam can be annoying, but it's not bad and offers an original RE story.
Dead Space Extraction has even more of a story focus and is slower paced as a result, but if you can accept that it's probably the best lightgun shooter on Wii thanks to the series' trademark satisfying dismemberment combat and strong atmosphere. And no, you don't need to have played the rest of the games to follow it as it is a prequel.
House of the Dead Overkill is modeled on grindhouse films; if you can look passed an intentionally juvenile sense of humor, it's good fun.
Any other good ones out there, or is that about it?
NNID: theRepublic -- Steam ID: theRepublic
3DS - Currently Gaming Like It's 2011 - The Legend of Zelda: Ocarina of Time 3D - Master Quest
Wii U - Currently Gaming Like It's 2015 - Super Mario Maker
PC - Currently Gaming Like It's 2012 - Borderlands 2
Mobile - The Simpson's Tapped Out and Yugioh Duel Links