Tail of the Sun was released for the original Playstation in 1997 by Artdink. It's an extraordinary experience set in an expansive open world featuring various monuments, landmarks, and oddities.

To beat the game, you'll simply need to kill animals and return the meat to your tribe until your weapon levels up enough to take on mammoths, which are located in the Tundra, north of your village. When the mammoth tusks are returned to your tribe, they are stacked until you can climb high enough to reach the "tail" of the sun.

However, once that's accomplished, you'll probably have a lot left to explore if you want to see everything this prehistoric wonderland has to offer. The instruction manual includes a map to get you started and furthermore lists some unmapped items and suggests there are many more.

Play this one on Retro Achievements so that your discoveries will count for something on paper.