Is it possible to make games (In a C language preferrably) without drawing lines and vectors with opengl - but instead use sprites with images that have been drawn in photoshop?

Because many 2D games (e.g. Fieldrunners for iPhone: http://osxreality.com/wp-content/upl...drunners-2.jpg... seem to have graphics that would require a "super professor who thinks in opengl" to be able to draw in code. Look at the icons at the bottom right, surely they can't have been coded from scratch? (Ok, I know everything in a computer comes down to code, but is it really that hard that every developer that wants to make games has to draw using a graphics API?)

Thanks