Here is the full list of all 40 Crossovers by POWGI (EU) trophies - there are 26 bronze, 9 silver, 4 gold and 1 platinum.
Collect all the trophies
Solve every puzzle
Find a missing letter "F"
You spelled it wrong
Spend at least a minute considering a solution
Completely miss the point of an anagram-based clue
Find a missing letter "X"
Find a missing letter "Y"
Find a missing letter "Q"
Unscramble words that are not the answer ten times
Find a missing letter "B"
Anagrams, huh?
Find a missing letter "S"
Unscramble three other words before solving a clue
Unscramble a word that isn't the answer
Find a missing letter "T"
Find a missing letter "H"
Find a missing letter "V"
Find a missing letter "P"
Find a missing letter "M"
Find a missing letter "W"
Find a missing letter "K"
Find a missing letter "L"
Find a missing letter "R"
Find a missing letter "A"
Find a missing letter "Z"
Find a missing letter "C"
Solve a puzzle without making a single mistake
Find a missing letter "I"
Find a missing letter "O"
Find a missing letter "N"
Find the correct letter on only the fourth attempt
Try the same wrong answer twice
Try five different wrong answers for the same clue
Try an answer that isn't even a word
Find a missing letter "U"
Find a missing letter "D"
Find a missing letter "J"
Find a missing letter "E"
Find a missing letter "G"