Time Limit: 2 minutes
This fight can be hard to get under the time limit, and the worst part about it is that you'll have to restart if you don't make it (if you're saving at the two appropriate areas). Always hold R2 for this battle -- this allows you to see which hole the Split Worm is coming from, and it also gives a good view while shooting the thing.
At the beginning of the battle, find out where the worm is coming from (hold R2) and move to the opposite side of it. Don't go too close to the worm or it might bite you. When it opens its mouth, fire two bullets at it. Do not fire a third because it will cause the worm to go back in the hole and waste precious time. After shooting twice, back up as far as you can and press R3 to reload. Wait there for the worm to do one of two things: Pound the ground with its head, or screech. Whenever it pounds the ground, you'll be stunned for a second or two, but shoot a bullet at the worm's mouth right when you regain control. This should cause the Split Worm to screech, and prepare for its instant kill attack. When it screeches, side step out of the camera angle (while holing L2 as always), and shoot the worm as it does its instant killer. You should be out of the way so you don't die of course. Continue shooting the Split Worm as it goes back to its initial position.
When the Split Worm opens its mouth again, fire two shots and it should close its mouth and either go back into its current hole, or come out and find another one. Either way, shoot at it while it does so. If it tries to find a new hole, you can easily unload 10 shots into the thing, which is great. When it comes back out from another hole, repeat this whole process. Sometimes after you shoot the first two shots (after it comes out of a hole), the worm will just sit there, and you'll be able to fire two more shots -- but only if it doesn't do anything for around three seconds. After, it should do the pounding ground attack.
This fight should take around 40-50 Handgun Bullets, which only one box of Handgun Bullets (with x5 bullet adjust) will cover. This fight is known to be the hardest fight to get under the required time because you only have two minutes, and this boss is quite unpredictable and may spend a lot of time backing into tunnels, wasting a lot of time. I've managed to get 1 minute 32 seconds for this fight, but a very common time is around 1 minute 50 seconds due to the unpredictability of this fight. Use a stopwatch to time yourself, and if you get over two minutes, you'll have to start the whole game again.
Time Limit: 2 minutes
This fight is also a bit difficult and can be hard to repeat the killing process. Equip the Shotgun for this battle, along with an Ampoule if you feel you need the extra speed. First of all, the Missionary blocks Shotgun blasts from the front, so you'll need to get a shot off from the behind or the side.
At the beginning of the fight, equip the Shotgun because Heather equipped the Handgun in the cutscene. With your Shotgun now drawn, strafe to the left or right, trying to get behind the Missionary -- he should do a blade attack but it should miss you and will leave himself open for attack. Blast him and he should fall to the ground. While the Missionary is on the ground, move behind him so that when he gets up he'll be facing the other direction, open for another attack. Shoot the Missionary once while he is on the ground, and prepare to shoot him right after he gets up. If you're close enough, he may swing his blades while he's getting up -- this is good, if it doesn't hit you. If you're behind him, blast him again, just after he swings his blades.
If the Missionary does not do the blade attack while getting up, it's either impossible or very hard to knock him down again right after. You can shoot him, but he never seems to fall. If he always does the blade attack while getting up, you can continue the strategy to kill him in around 1 minute 30 seconds.
When the Missionary is running, always use the strafing buttons to dodge his running attacks. Never shoot him from the front, especially if you're close to him. If he's right in your face when you shoot him, he ABSOLUTELY will hit you afterwards (unless you manage to block the attack).
Time Limit: 3 minutes
There are two good strategies for this fight, both involving the Sub Machine Gun -- so be sure you get it, along with every magazine for it. One of the two strategies involves the Submachine Gun and the Shotgun. The other involves only the Submachine Gun, which is a hard strategy to perfect, but you can get less than 30 seconds with it.
For the first strategy, have the Submachine Gun equipped. Strafe a bit to the left at the beginning of the fight and unload Submachine Gun Bullets into Leonard until he falls down. Then quickly enter the menu and equip the Shotgun. Reenter the game and start shooting Leonard with the Shotgun while he's on the ground. Count the shots in your head and reload in the menu. You might want to use an Ampoule so you can move faster. You can use this strategy without letting Leonard get up once, but I find that it can be difficult to do. That is why I use the below strategy.
For this strategy, equip the Submachine Gun for the entire fight. At the beginning, strafe to the left and unload some bullets into Leonard until you notice him starting to fall -- quickly stop shooting and get ready to continue shooting Leonard while he's on the ground. Also make sure you don't waste many bullets trying to bring him to the ground because you'll need a fair amount to keep him pinned down -- if you have less than 10 bullets in the magazine, it's very likely that he'll get up and smack you shortly after you run out of ammo in the magazine. You can reload in the menu instead of in the game, but I don't find that it helps much because you have to aim back at Leonard on the ground.
Try to get very close to him while he's on the ground so that all your bullets (except for the first few while you aim the gun down) hit him.
If you're far away, only a few bullets will hit him and he'll get up. It's hard to perfect this strategy, but it really helps for time. My best time is 19 seconds -- that's right, 19 seconds, that's how fast it is. It only requires four Submachine Gun magazines if you do it right. But once again, it's hard to do. However, if Leonard gets up, try it again later. Note how fast Leonard starts to swim after entering the water, and try to start shooting him before he swims. Always reload in the game for this strategy because it makes it easier to keep shooting him and you can constantly hold down on the left analog stick -- however, after you reload Heather starts shooting ahead, but she quickly aims down.
Memory of Alessa
Time Limit: 3 minutes
This is the easiest battle in getting a 10 star ranking, and only requires around 30 Shotgun Shells (one pickup with x5 bullet adjust).
Equip the Shotgun at the beginning of the fight and wait for Alessa to come towards you. The moment she swings -- it will make a distinct sound -- is when you shoot, with the Shotgun ready of course. Every time she does this, she is completely vulnerable to your attacks. When Alessa starts to run away, run up to her and shoot her from behind.
When Alessa has the Handgun and Submachine Gun, she will aim her gun at you if you are far away -- this is the time to shoot. You can also run up to her and she'll try to do a pistol whip (or whack you with the SMG), which is similar to the melee weapons. She also takes more damage when you're right in front of her as well. If you don't know where she is when you hear the cocking of her gun, just aim your Shotgun and shoot -- it should lock on to her and shoot her.
You might want to reload in the menu, especially if Alessa is in your face. And near the end of the battle in her last form, shoot her while she's on the ground before she gets up, however, she should get up after that. Repeat the killing process and she should die rather quickly. This fight is easy and it should take around 2 minutes or less. You have 3 minutes to defeat the boss, but you shouldn't need all that time.
Time Limit: 8 minutes
This boss is very long and it is pretty hard. However, you're saving just before it so you can't really go wrong here. There are a few good strategies for this boss. One strategy involves the Handgun and the Katana. At the beginning of the fight, back up behind the semi-circle on the ground, and fire 3 shots at the god to make it come down. Wait behind the semi-circle for the god to its arm swing, and then equip and Katana and move in towards the god, doing either the 3-swing combo or the thrust attack. Then quickly move behind the semi-circle and wait for the fire to be thrown. Continue this strategy, and always only fire 3 shots to bring the god down -- don't waste any ammo. You should use any remaining Ampoules for this fight because speed is crucial for dodging the fire. The god starts throwing fire very quickly with this strategy, so you may want to try another.
Another good strategy involves the Handgun and the Shotgun. Use the Handgun to bring the god down and use the Shotgun to blast the god's face. However, you are guaranteed to be slapped (or head butted) by the god right after you shoot it with the Shotgun right in front of it. If you plan to do this, make sure you have the right amount of health items, and that your damage is low enough so that you can do this. You can use the Shotgun to fire twice behind the semi-circle, but fire will be thrown near the beginning of the fight. It's not hard to dodge the fire, it's just more convenient to have the fire thrown later in the battle.
To dodge the fire, simply start at the back of the battle area on the left or right side. When the fire comes, strafe to the other side, following the outside of the semi-circle. When the fire becomes very quick, you might not want to move as fast; move fast to get out of the way, but don't try to get to the other side as fast as you can. I say this because the fire can get to you if you move fast and just stand still at the other side.
I recommend you use the Handgun and Katana strategy for this fight because it's better for damage. You should need around 100 Handgun Bullets, and make sure you don't waste them. Only shoot when they'll actually do something.
Nightmare Hospital Madness
Both versions of the hospital can be hard to avoid taking damage. The main factors that cause this are Nurses and Slurpers. The latter is the larger factor. The are some great solutions for when fighting Slurpers. You should pick up the several packs of Beef Jerky lying around in the game, and place them on the floor for Slurpers to chomp on. Turn your Flashlight off so they don't see you. While the Slurper is eating the jerky, blast it with the Shotgun. It should start to move towards you -- hopefully you're a fair enough distance away so it can't knock you to the ground. It can be hard to deal with Slurpers like this in groups, but sometimes they get stuck on each other and can't pass. You should have plenty of Beef Jerky, so put them in a few places around the room.
Another strategy is using the Handgun with the Silencer. You can use this with Beef Jerky as well, and the Slurpers won't be able to find you nearly as well. With your Flashlight off, shoot them from a fair distance away, however, move close enough so the bullets actually hit. You can also use the Submachine Gun with the Silencer, however, try not to use all your bullets; you'll need them for Leonard.
Nurses aren't as annoying as Slurpers but can still cause a lot of harm. Always go for the Nurses wielding Revolvers first, they are the most threat. Quickly run up to them and give them a Shotgun blast to deal with. In some rooms you will be ambushed by three Nurses. It's okay to receive damage from them, but only one hit at the maximum. Right after entering a Nurses-filled room, use the Shotgun to blast them as they come towards you. Use the left analog stick to aim the Shotgun on another Nurse after shooting one -- this will either stun them or knock them down. Usually one shot will hit two Nurses, which is great. Keep switching targets to the Nurse the closest to you. When they're all knocked down, either kick or shoot them to death.
Haunted House Spiky Roof
If you just walk through the spiky roof area in the Haunted Mansion, you will die (on Hard Action Level, which is required). What you want to do is to make Heather a little lower so the spikes don't hit her. Enter caution mode and walk through the corridor. The spikes will fall and you won't. There is a weird noise when the spikes fall, sounding like you got hit, but don't worry about that.
Red Glow Hallways
Running through these hallways can be very hard, especially if you're playing on any Extreme Action Level (that's why you should play on Hard). You should spend a play through practicing running the hallways (along with bosses, et cetera). Remove all weapons before starting to move down the first hallway. Weapons just slow you down. Know the path -- use the map below if you need to -- and make sure you don't hit any walls. Before pretty much every corner, tap Square (with Walk/Run Control Reversed) so that you walk for a slight second, not running into the wall. Do this for every corner where you've been moving fast enough to run into a wall. Below is a map of both the hallways (they're identical) that should make things easier. Also, there is a door before the actual door in the first hallway -- it has a broken lock; you should already have known that.