Unreal Engine vs Unity is a battle of two of the best game engines – and certainly the most popular. Together, Epic Games' Unreal Engine and Unity Technologies' self-named platform were responsible for 79% of the games released on Steam in 2024 and 57% of units sold (the difference between the figures is because of the number of big-selling AAA studios who still use their own engines).
Unity is still the most popular of the two in terms of use, accounting for just over half of all games on Steams, but Unreal Engine has overtaken it in terms of sales. That's indicative of a preference for Epic's platform among bigger-selling games, often with the photorealistic 3D graphics that Unreal Engine 5 is known for.
