What battle royale mode was added to Forza Horizon 4 in 2019?

The battle royale mode added to Forza Horizon 4 in 2019 was The Eliminator.

The mode arrived in December 2019 as part of the Series 17 update and supported up to 72 players. Instead of beginning in a powerful supercar, competitors started in relatively modest vehicles and searched the open world for car drops. Finding better cars improved a player’s chances as the playable area gradually contracted.

Players could challenge opponents to point-to-point head-to-head races. The winner could either take the defeated player’s car or accept an upgrade, while losing a head-to-head eliminated the unsuccessful driver. Players could also be eliminated by leaving the shrinking safe zone. The final competitors raced toward a finish point, with the first driver there winning the event.

The Eliminator borrowed the structure of battle royale games while adapting it to Forza Horizon’s open-world driving. It is therefore not the same as a traditional race or a separate “Horizon Royale” mode. The title also reflects the mode’s central rule: drivers are progressively removed until only one remains. Microsoft later described The Eliminator as Forza Horizon 4’s most popular multiplayer mode.