There aren't any eye-popping visuals in
Slope; the 3D world is just the silhouette of a nighttime city. The player directs a ball that continues rolling straight ahead at a growing rate as it navigates obstacles like tunnels and ramps. At first glance, the player's involvement isn't required because the track appears level apart from the "thresholds," yet even the slightest deviation from the centerline will lead the player to tumble off the track and lose.