Jean Jarques (JJ)
JJ founded Jumbo Jelly, a PC game QA studio, and leads its testing. A full-time QA professional with 25+ Steam releases shipped, including POSTAL: Brain Damaged, Blood West, Frozenheim and Hordes of Hunger.
JJ writes the articles on this site and signs off on every number in them. Where a text describes testing, it describes work the Jumbo Jelly team did on the games named in the public case studies; everything else is sourced or labelled as an estimate.
Contact
Corrections and questions: contact@jumbojelly.com. Studios with a build to test can book a 30-minute call.
Articles by JJ
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Launch
Steam Playtest vs demo vs beta branch: which one to use for pre-launch testing, and what each costs in setup time -
Launch
How long does Steam review take? Store page and build review timelines, with a 6-week release calendar -
Patches
More patches, more bug reviews? Steam game patches vs reviews -
Patches
Day one patch: 22% of Steam launches patch within 24 hours -
Launch
Early Access Launch Checklist: 35 Checks Before Steam -
Buying QA
Game QA cost in 2026: rates, hours and 4 billing models -
Buying QA
QA Brief for a Game: 10 Fields and a Free Template -
Launch
Pre-launch game testing: what 30 hours of QA finds -
Data
Steam launches in numbers: 2,739 games in September 2026 -
Next Fest
Steam Next Fest February 2027: 8-Week Demo QA Plan