This page of the guide to Resident Evil 3 Remake has a walkthrough for the first visit to Raccoon City's Downtown. It is one of the biggest areas in the game. Jill has to reach the substation to restore power supplies. The following table shows the optimal route through the center of Raccoon City.
Our walkthrough focuses solely on describing the steps required to advance in the main storyline. If you are interested in optional exploration, check out Secrets and other chapters. There, you can find information about the collectibles in Downtown.
Reactivate Power at the Substation
Watch out for the first zombie you encounter in Downtown. You can try to run past him, but it is safer to just kill the enemy. The main street is blocked - you have to choose a side alley. Collect ammo along the way and get ready to face two zombies. If you are having trouble tracking them, back off a bit and wait for them to come out of the shadows.
You are back on the main street - go straight ahead. Explore the right alley at the right end of the main street. You learn that you need to bring a hose to the hydrant to put out the fire.
Turn around and return to on the main street. Take a few steps forward - the right fence will collapse and a group of zombies will come out. Stand back and aim at the red barrel. Shoot it when there are zombies next to it. The explosion should kill all the enemies.
The staircase on the right leads to the Donut Shop. There is a group of zombies in the area. You can eliminate them one at a time (remember to use the knife to finish off zombies laying on the ground) or try to run a slalom between them.
Check out the kitchen at the back of the Donut Shop. You will find a typewriter and an item chest.
The Fancy Box found in the kitchen is linked to the puzzle with the clock at the subway station - its solution is on The puzzle with the clock in the subway - how to solve it? page.
Use the back exit and head north. You can also kill zombies with one shot at the red barrel. The destination is the Kite Bros Railway building located on the left.
Go inside the Subway Office building and kill the zombies. The most important item here is a fire hose lying in the hallway - you will need it to put out the fire.
Check out the control room (you have to return here after restoring the power supplies) and the office. Notice the M3 Shotgun locked inside a case - you can get back for the shotgun soon after finding the bolt cutters.
Return to the area with the fire. It is in the east alley on the main street. Interact with the hydrant to use the recently acquired fire hose. Jill puts out the fire and unlocks the passage to the garage.
Inside the garage, you can find e.g. a typewriter and bolt cutters. Take the cutters and go back to the Kite Bros. Railway building and open the display case with the shotgun. To move the plot forward, use the cutters on the side doors. Get inside the second room and watch the cut-a scene.
The bolt cutters can also be used to cut all the other chains you found before entering the garage. Check out the Secrets chapter in our guide.
Use the back exit of the garage to reach the side alleys. Watch out for zombie dogs that will show up around the corner. You can shoot at the left generator to electrocute them. You can also use the shotgun to get rid of them faster. Try to avoid situations where a zombie dog jumps on Jill and bites her.
Choose the alley that was "guarded" by zombie dogs. It will lead you to the Subway Power Substation.