Turn-based RPG where a teenager and his friends jump through time portals to stop a world-ending creature. A malfunctioning teleporter at a festival sends you to the medieval era first, then to a ruined 2300 AD where you learn that Lavos—a parasite hibernating underground—will surface in 1999 and destroy civilization. You recruit party members across eras: a cursed knight-turned-frog in 600 AD, a robot in the apocalyptic future, a cavewoman chief in 65 million BC. Combat uses the Active Time Battle system with combo attacks between characters. Each era has distinct problems you can solve, and your actions ripple forward through history. The story involves a floating magical kingdom in 12,000 BC that tried to drain Lavos for power, triggering catastrophe. You'll gather legendary weapons, repair a broken sword, and eventually assault Lavos directly. Multiple endings depend on when you fight the final boss.
