Resident Evil: Deadly Silence

If I recall the flamethrower can only be used as Chris, and it's in the caverns below the courtyard. I believe it's on the wall in one of the tunnels on your way to Enrico. By the way, if you're talking about the giant spider, you don't need the flamethrower to kill it...

No monsters need the flamethrower to kill - it's only needed to burn some zombies (kek) and to pass through certain doorways, as above mentioned.

Both Chris and Jill obtain the flamethrower but in different areas of the mansion. For Jill, she pbtains the flamethrower during the part of the game where you jump down the hole after the second battle with Yawn and during the area where you find Enrico. For Chris, you can only find the flamethrower when you are in the underground area before the gaining access to the lab. The giant spider can be taken out via flamethrower but is much easier with the shotgun or magnum. Should be used to destroy the webs on the door if you are to lazy to use your knife (Like me).

You can't get unless you are Chris Redfield . But I do recall getting it once before...... but I think I used codes??? :3