If you share what specifically you're trying to achieve (two players on one PC with this exact game), I can help further with mods or workarounds that don't rely on repack misinformation.
Running split-screen via the Nucleus Co-op method renders the game multiple times simultaneously. This increases hardware load significantly. flatout ultimate carnage split screen pc repack
"Cheap move!" Mark yelled, slamming his truck into the side of Leo’s sleek muscle car. They hit a massive jump simultaneously. In If you share what specifically you're trying to
The PC version does support two input devices (Player 1: Keyboard, Player 2: Controller). Player 2: Controller).