Jill Valentine Achievement in Resident Evil 3

To unlock Inferno difficulty, you must've completed the game on Nightmare difficulty first. Please follow Step 2 in the Road Map on how to take on this difficulty head on. Skipping a majority on the areas in the game will be a must as time does play a factor when going for this achievement. The coins and items to carry with you should be as follows: x2 Recovery Coins, x2 Iron Defense Coins, x2 Assault Coins, S.T.A.R.S. Field Combat Manual (for perfect dodging), and x2 hip pouches. The pouches will not be in the item box but next to it. Only the Infinite Rocket Launcher will need retrieving from it and store any items you start out with. Going by that you know the layout of the game already, you will have no problem speedrunning through this difficulty with these items in tow. The only real danger, in my opinion, will be the start of the game since you'll be "stock Jill" with no coins. The first zombies are tricky (the one that rushes you when you regroup with Brad, the one by the fenced gate by the school bus, and the two zombies that exit the elevator). After this, just glide through the game.

The other real roadblocks will be when Toy Uncle's big head comes rolling down (mistimed dodge can actually get you crushed) and Nemesis Stage 3. So make a save prior to these events. Remember to also keep saves to an absolute minimum (5 max) as too many saves will affect your S Rank. Let it be known that there is no checkpoints in Inferno mode, and some typewriters will not be available in some safe rooms. Just unload on every enemy you see with the Infinite Rocket Launcher even in slowmo mode. The splash damage will not hurt nor stun you in slowmo mode. There will be no need to pick nothing up, only the story-driven items. You can carry herbs just in case an enemy got really lucky and hurt you. Doing this will have you in the 1 hour, 25-40 minute runtime, well under 2 hours if you're going for that "Sprinter" achievement as well.