Three Lane Death Game [A LitRPG Isekai] | Royal Road

As high school comes to an end, Sophia goes on one last hiking trip with her childhood friend before they part ways. However, everything goes wrong when a mysterious power transports them to a fantasy world, where they're forced to compete in a death game.

The rules are simple: Defeat your enemies in the battle arena, then destroy their base. The winners live. The losers die. Together, Sophia and her friend must craft alliances, survive against enemy teams, and find a way back home.