This plays and feels like an older, glitchier Lego game. The polish seen in the second Harry Potter or other games like Batman is not present here, and the fun of casting spells and running through the first four movies is diminished somewhat by the tedious puzzles and obtuse system of character switching via potions. The quidditch levels could have been a lot better as most of the time you'll be idly watching a quidditch match while playing through a tedious platforming level instead of riding a broomstick yourself. Overall fun for mega Harry Potter fans but if you're looking for a really great Lego game, try years 5-7 instead.
I've played every Lego game other than Harry Potter 5-7. I have to say though years 1-4 is definetly my least favorite. While I was plying the game it was missing something every other lego game had. I hated the fact that you had to walk around hogwarts for 30 min doing stupid tasks just to get to the next level. Another thing is every year in the game is pretty much the same because you visit the same places and do different tasks in the same place! The only year that was unique was year 4. The character unlocking system was also horrible, you actually had to go around finding charter tokens to buy characters. There was some pretty cool aspects to the game though the different spells that you use for different situations was a pretty clever way to implement the harry potter spells into the game. I honestly would not recomend this game at all. If your a die hard harry potter fan then you would probably enjoy the funny cut-scenes from the movie but other than that and a few sections in this game this game sucks.
This was a fun game to play over a couple weeks. The game goes through the basic story-line with modifications that make it work as both a video game and as a kid friendly game. If you are a Harry Potter fan you will enjoy this game as long as you don't take sticking to the exact story-line too seriously. It is a lot of fun to just explore around Hogwarts with the Harry Potter music playing in the background.
They lock the user out of being able to complete the game 100% by just playing through the story. You have to beat the game, then go through the levels again to get past ~35% completion. After I got to about 75% I had to use a guide online to find the rest of the items to get to 100% completion. Once you find the red bricks, go to the shop in diagon alley that you can buy them, then go to the extras section of the start menu to enable them. This will help you get to 100% completion a lot faster than I was able to.
It is also fairly easy to get every achievement as well, about 85% will be satisfied by completing the game 100%.