Resident Evil 2

These apply to the 2019 remake of Resident Evil 2 (also the Nintendo Switch 2 Deluxe Edition).

Infinite weapons:
The bonus weapons have infinite ammo, but you still have to reload them when the magazine is empty.

Weapon                        How to unlock
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Infinite Combat Knife         Destroy all 15 Mr. Raccoon figures
Infinite Samurai Edge         Get an S rank on Standard
Infinite LE 5                 Get an S rank on Hardcore
Infinite Minigun              Clear Claire's A or B story on Hardcore with an S rank in under
                              2 hours, with 3 saves or less and no bonus weapons
Infinite ATM-4 Rocket Launcher Clear Leon's A or B story on Hardcore with an S rank in under
                              2 hours, with 3 saves or less and no bonus weapons

The Infinite Combat Knife is the easiest to get and makes the later runs easier, since its durability never runs out.
An S rank on Standard requires clearing a story in under 3 hours and 30 minutes.

Mr. Raccoon figures:
Listen for a plastic clicking sound. The small Mr. Raccoon figures are hidden around Leon's and Claire's stories and can be destroyed by attacking them.