Whilst ONRUSH is packed with online features – including multiplayer and campaign co-op, there will be no implementation of split-screen. As revealed already by Codemasters, the feature is something the team adores, but it's not doable due to the “ambitus timeline before release” for ONRUSH.
Is onrush a two player game?
Onrush is a teamwork-focused racing game. It isn't about finishing first or being the fastest, but rather it is about working with your five teammates to win the rounds in the objective-based modes. ... Unfortunately, like many racing games nowadays, there's no splitscreen multiplayer in Onrush.
How many players can play onrush?
The game itself is a team game; twelve players are split into two teams of six.