 Reviewers said that the expansion 's single @-@ player game was more difficult than that of Neverwinter Nights 2 ; 1UP.com stated that Obsidian " [ Upped ] the ante with tougher enemies and a more challenging experience altogether " The expansion also has more puzzles which make the player think , rather than somehow being resolvable through combat , with one reviewer noting that the expansion has " genuinely tough logic puzzles ( some frustratingly short on clues ) and a series of side quests that completely vary ( some might not even open up ) depending on your party makeup " . Multiple reviewers mentioned that the expansion is more serious than Neverwinter Nights 2 . 
