12. Card Collector - The Witcher 3: Wild Hunt
The Witcher 3 is still our frontrunner for
Game of the Year 2015, and for good reason - even its mini-games are more robust and fun than other developers' full releases. As such, Gwent - the card-battler you can instigate against almost every major character across the story - has within it an alluring Pokémon-style 'collect-'em-all' element. Card Collector is exactly that, but just to mess with you, there are 199 cards in total, yet 79 are duplicates (the same base card with a different ability), leaving 120 uniques you'll have to make sure you have first. Snatch up the lot across any of your playthroughs (the game supports New Game+ as of Patch 1.08) and you'll get the trophy... until the DLC expansions undoubtedly add more to collect, anyway.