Supplementary materials for: Evidence under fire: what studies of gamification in Ukrainian higher education can and cannot show — a systematic review (2015–2025)

Supplementary materials for a PRISMA 2020 systematic review of empirical studies of gamification with students of Ukrainian higher-education institutions (48 included studies in 49 reports, published 2017–2025). Version 2 accompanies the revised manuscript: after peer review, a re-screen of 187 excluded records and one round of backward and forward citation searching corrected the corpus from 22 to 48 studies. The package contains the protocol and search strategy; PRISMA 2020 flow counts and checklist; the screening log of 605 records with post-review decisions; the full-text re-screen log; the citation-searching log; extraction, study-characteristics and risk-of-bias tables; the coding, code and output of the sensitivity analyses of the null-result share; the list of included reports (APA 7); and all figures in PNG and SVG. README.md describes each file.