The 'Jill Sandwich' Line
A classic and often-quoted line from Barry Burton. If Jill is caught in the falling ceiling trap in the Dining Room (after picking up the Shotgun), Barry will save her and utter the famous line: "You were almost a Jill sandwich!" This is a memorable moment for fans.

The Zombie Head Turn
In the very first zombie encounter in the mansion, if you wait long enough without shooting, the zombie will slowly turn its head towards the camera, a subtle but effective jump scare that became iconic.
The S.T.A.R.S. Photo
In the S.T.A.R.S. office, examine the photo on the desk. It's a picture of the entire S.T.A.R.S. team, including characters not seen in the game. This adds to the lore and world-building.
Alternate Endings
Resident Evil (1996) features multiple endings depending on your actions. Saving specific characters (Barry/Rebecca) and collecting certain items (Dog Tags for Chris) can lead to more positive outcomes. Experiment with different choices on subsequent playthroughs.
The Invisible Enemy Glitch (Original PS1)
In some rare instances on the original PlayStation version, enemies could become invisible due to a rendering glitch. While not intentional, it added an extra layer of terror for unlucky players. This was largely fixed in later versions.
Compare hidden secrets & easter eggs inResident Evil Village