Unreal Engine 4

Lore & Background

People Can Fly has always treated its engine choice as a creative partner rather than a mere container. When the studio moved from the id Tech 3 base of the 2004 Painkiller to Unreal Engine 3 for Hell & Damnation, and then to Unreal Engine 4 for the 2022 reboot, each transition unlocked new expressive vocabulary: more dynamic lighting for the hellish environments, richer particle systems for the signature shotgun-and-saw-blade combat, and a more flexible level-design toolset that let the team build arenas with verticality and destructible cover.

The 2022 entry leaned heavily into UE4's material and lighting pipeline to sell the game's core fantasy—Pain tearing through hordes of demons in environments that shift between industrial corridors and open, apocalyptic landscapes. The engine's post-processing stack allowed the team to push high-contrast, saturated palettes that read as almost comic-book in intensity, a deliberate stylistic through-line from the franchise's earliest entries.

From a legacy standpoint, the UE4 build of Painkiller sits in a lineage of fast-paced, movement-heavy shooters that prioritize feel over simulation. The engine's networking and prediction systems supported the split-second timing the genre rewards, while its asset pipeline let People Can Fly iterate on weapon handling and enemy AI at a pace that matched their design philosophy of constant, escalating action.

In Their Own Story

The loading screen flickers to black. A single heartbeat—Pain's—rumbles through the bass channel. Then the world snaps into focus: a cathedral of rusted iron and black glass, its vaulted ceiling cracked open to a sky the color of a bruise. UE4's global illumination paints every rivet in cold, directional light while the ambient hellfire beyond the shattered windows throws long, licking shadows across the floor. A horde stirs in the distance, chitinous and many-limbed, and the sound design swells into a wall of shrieking. Pain's jaw sets. The shotgun's pump catches the light one more time. The engine holds at sixty. The fight begins.

Reader's Guide

People Can Fly approached the 2022 Painkiller as a pure-feel exercise: every weapon, every enemy pattern, every environmental interaction tuned around the question of how fast and how loud the moment can be. Unreal Engine 4's toolset let the team prototype level geometry and combat flows rapidly, iterating on arena layouts until the pacing felt relentless rather than merely fast.

Technically, the build leaned on UE4's PBR material system and dynamic lighting to achieve the franchise's signature high-contrast, saturated look. Motion-capture and hand-keyed animation blended to give Pain's melee moves a weight and snap that reads as physical even in the most absurd situations. The engine's particle and post-processing stacks handled the constant barrage of gore, sparks, and environmental shrapnel without sacrificing frame-rate consistency.

Critical and fan reception generally praised the game's commitment to its over-the-top identity and the tightness of its combat loop, while noting that the scope was more focused than the 2004 original. In the broader fast-paced FPS landscape, Painkiller's UE4 entry reinforced the idea that a small, design-obsessed studio can compete on feel and spectacle without needing the scale of a AAA open-world production.

Did You Know?

• People Can Fly has powered every mainline Painkiller title on a different engine, from id Tech 3 in 2004 to Unreal Engine 4 in 2022, treating each transition as a creative reset.
• The 2012 entry, Painkiller: Hell & Damnation, was built on Unreal Engine 3, making the 2022 UE4 build the second Unreal-powered installment in the franchise.
• The franchise's core design pillar—combining a shotgun with a close-range melee weapon in a single fluid attack chain—has remained consistent across every engine generation.
• Painkiller (2022) was published by Aspyr Media, marking a shift from the earlier Gearbox and Devolver Digital publishing relationships.