Epic gives Unreal Engine 4 away free — 5% royalty only after $3,000 a product

Unreal Engine 4 launched in 2014 with a $19-per-month subscription plus a 5% royalty — a paywall that kept hobbyists, students and non-game industries out. At GDC 2015, Epic announced the engine would be free to everyone, with all future updates free.

Give a AAA game engine away free with full source code and charge only a 5% royalty on revenue past $3,000 per product — price on success, not access.

Anyone could download UE4 immediately, including 100% of its C++ source code, for games, education, VR, film and architecture. Developers paid a 5% royalty on gross revenue only after the first $3,000 per product per quarter; film, simulation and architecture work stayed royalty-free.

The move put a AAA engine into the hands of indies and students and pressured rivals to change their pricing. In May 2020 Epic raised the royalty-free ceiling to the first $1 million of lifetime gross revenue per product, retroactive to January 1, 2020.

Unreal Engine 4 launched in 2014 under a $19-per-month subscription plus a 5% royalty — an access fee that kept hobbyists, students and non-game industries away. At GDC in March 2015, Epic Games announced that UE4 would be free to everyone, with every future update free and 100% of the C++ source code included.

Developers now paid a 5% royalty on gross revenue only after the first $3,000 per product per quarter — a threshold most small projects never crossed. Film, simulation and architecture work were exempt from royalties entirely. Epic framed the arrangement as shared fate: 'we succeed only when you succeed.'

The change put the same engine that powered blockbusters into the hands of indie and student developers, and rivals had to respond to the pricing pressure. In May 2020 Epic went further, waiving royalties on the first $1 million of lifetime gross revenue from all Unreal Engine titles, retroactive to January 1, 2020.

Free access removed every barrier between creators and the industry's most advanced engine, multiplying the developer base.

A royalty that starts after $3,000 aligns incentives: Epic earns only when its users earn.

Full source code made the engine a trustworthy platform developers could extend, deepening lock-in.

Exempting film and architecture let non-game industries adopt the tool and broadened the ecosystem.

Price the tool on the customer's success, not on access: free entry grows the base, and a royalty turns the vendor into a partner who wins only when users win.

The free-plus-royalty structure became Epic's engine business for the next decade. The 2020 threshold raise to $1 million — retroactive to the start of that year — confirmed the model's direction, and the same licensing applied across the Unreal family. By the 2020s Unreal Engine was the default for much of AAA games and film virtual production, and its pricing became the benchmark other engine makers had to match.