This is a short and also it's easy to complete. Attic: The reason that why they don't put Smith Heist Part 1 is because that Smith's Birthday Party is Heist Part 1, now you are in Smith's attic, now you can't carry the box because it's too heavy because that the animals, RJ and Verne can get through but not he box since it's overweighted, now there are some rats and also bunnies, Now just defeat the rats and rabbits or just avoid them at all cost, Now go through but it's very short to the loot zone, pick up the laptop and just walk a few blocks and then drop it into the loot zone, there is a ring sound after you drop it into the loot zone, there is a switch to open up the doors, after turning on the switch, now pick up the black box and carry it through the tunnel and drop it onto the laying flat thing on the floor and just jump onto the boxes and just jump out of the attic into the yard, you then complete the attic part, Yard:
Now they introduce a new enemy, this enemy is a small hamster that runs very fast and also he shoots you by just hitting balls at you, Now the quickest way to defeat those gophers from getting more is to defeat the enemies base again. Now, defeat all gophers and defeat the only new enemy and then after defeating the gophers, then a piece of the fence breaks and there is rats coming out from the playground. There are a few of them, defeat and it's pretty easy but it's also the first enemy when you start a new game depending on what level you are on. Now you are at the playground but there is a very fun part if you like to try, first just get on the level while the computer player is not jumping onto the slide and get on the beam, there is a another flying stove flying around but they can't reach you since they can't fly too high, they are almost close to getting high of you, now see that the computer person getting shooted by lasers while the flying stoves are just dropping firey plates on him leading into can't jump over the lasers, After a lot of fun, just jump over the lasers, get onto the stairs, there is also a cage but you know what, there is no rats coming out so you don't need to worry about those rats, press the right button when you are close to the door and then you complete the level. Now you are in Smith's House now.