Necrorun Zombie Parkour Runner IX-Runner Dont Run With A Plasma Sword Blood Run Save Them All Crazy Control 2 Monkey Ninja Tiny Wings One Epic Game Super Bit Bash Spooky Hoofs Pix N Love Rush Gravity Guy Jetpack Joyride One-Tap Hero Run Roo Run Ninja Chicken <-- forgot which one of them NC titles Rayman Jungle Run Me Red Gun Runner Ovenbreak Ninja Cat 2 Kinito Ninja Polara - looks 2D to me, but with high number of frames on the main character Lara All i could think of right now.
Impressive list, thanks! On the face of it, some of these are side scrollers (as opposed to forward runners, Temple Run style). Maybe I'm using the wrong terminology? Will check these out.
I dont remember any behind the back runners with 2D art since the perspective itself is in 3D. Everything I posted here are side-scrolling runners, but they are completely in 2D.