What the Frictional Mod Jam Is and How to Take Part

The Frictional Mod Jam is a community modding event run by Frictional Games in which participants build mods on the studio's HPL engine around a set theme. Each edition is announced on the studio's site with its own theme, duration, submission link and prize, so the way to take part is to read the announcement for the current jam and submit through the link it provides. The most recent edition described on the site, Frictional Mod Jam 2026, runs from May 27th to August 25th under the theme "WHAT IS REALITY?", uses HPL engine modding as its medium, and offers one ROG Xbox Ally from ASUS ROG as the prize.

What the event involves

The jam is built around the HPL engine, the technology behind Frictional's own games, and the site lists HPL1, HPL2 and HPL3 as the relevant engine versions across jam posts. That means entries are mods made with those tools rather than standalone games built in other engines.

The theme is set per edition and is meant to steer the work rather than prescribe it. For 2026, the announcement frames "WHAT IS REALITY?" as a prompt about things that stop lining up: systems that behave almost as expected, and the question of whether what you are looking at is really there or just convincing enough. Treat that as the creative brief your mod should answer.

Editions and what each one announced

The 2024 edition was announced as the "Escape Room Edition," described as an event where "creativity meets strategy, and innovation intertwines with mystery." The site excerpt does not give its dates, submission link or prize, so check the original post if you need those details.

How to take part

1. Find the current announcement. Jam posts appear on the Frictional Games site under the News and Blog categories, and each one carries its own title, such as "Frictional Mod Jam 2026 – WHAT IS REALITY?" Read that post in full before starting.
2. Note the four constraints. Every announcement states a duration, a theme, a medium and a submission link. For 2026 these are the dates above, the reality theme, HPL engine modding, and the submission link given in the post.
3. Build within the medium. Plan your mod around the HPL engine version you are comfortable with; the site tags jam coverage with HPL1, HPL2 and HPL3, so the toolset is the frame, not an afterthought.
4. Answer the theme. Use the theme text as your design constraint. For 2026, that means building something that makes the player doubt what they are seeing rather than simply decorating a level.
5. Submit through the announced link before the deadline. The submission link is published in the announcement itself; there is no separate portal described on the site.

Verifying your entry is on track

• Your mod runs on an HPL engine version and can be loaded as a mod.
• The theme is visible in the play experience, not only in a description.
• You have submitted through the link in the current announcement before the stated end date.

Common sticking points

Assuming the rules carry over between editions. Themes, dates and prizes change each time: 2024 was an escape room theme, 2026 is a reality theme with a hardware prize. Always work from the current post.

Missing the prize's conditions. The 2026 prize is one ROG Xbox Ally supplied by ASUS ROG. The announcement excerpt does not describe eligibility, shipping or regional limits, so read the full post and any linked terms before counting on it.

Treating the theme as optional. The theme is the organising idea of the jam, and the 2026 brief is deliberately abstract. A mod that ignores it is harder to judge against the event's stated purpose.

Leaving the engine question late. Because the medium is HPL engine modding, decide early which HPL version you are building on; switching mid-project is the kind of delay that eats a three-month window.

Where the jam sits in the wider site

Jam announcements are mixed in with the studio's other news, including game updates such as the Amnesia: The Bunker 1.31 patch and merchandise posts like the Simon from SOMA plushie. If you are browsing for the current jam, look for posts titled "Frictional Mod Jam" with a year, and check the categories HPL1, HPL2, HPL3 and Event, which are attached to jam coverage.