Here is the full list of all 28 Word Sudoku by POWGI trophies - there are 10 bronze, 11 silver, 6 gold and 1 platinum.
Collect all the trophies
Solve PULSATING, DYSTOPIAN and NIGHTMARE
Solve ANXIOUSLY and TREMBLING
Solve HUMDINGER
Solve COMBATING, DANGEROUS and MACHINERY
Solve UNCHARTED, SPIDERMAN and MINECRAFT
Solve SKEPTICAL
Solve ADORINGLY and TRIUMPHAL
Solve LUNCHTIME and ANCHOVIES
Solve SPLINTERY and SHIPWRECK
Solve OUTWARDLY and AWESTRUCK
Solve JUBILATED and BYSTANDER
Solve SUPERNOVA
Solve EDUCATION and FORMALITY
Solve WORDSMITH
Solve PATCHWORK and CARPETING
Solve EXPLODING and CHEMISTRY
Solve GHASTLIER
Solve STRANGELY and EMBRACING
Solve GUIDEPOST
Solve HIDEOUSLY, NEFARIOUS and SCOUNDREL
Solve ADJUSTING
Solve WONDERFUL and DISCOVERY
Solve SECONDARY
Solve CHAMPIONS
Solve DEFIANTLY, BETRAYING and ADVERSITY
Solve EMULATING, UNIVERSAL and BENCHMARK
Solve WELCOMING