R Key

Effects

• Returns Isaac to the beginning of the run in Chapter 1, with all stat boosts, items, pickups, and trinkets intact (similar to Victory Lap).

Notes

• (Angel Room) Angel Rooms once again become possible to appear even if the player has made a previous devil deal.
• The chance for a (Planetarium) Planetarium to appear can once again be increased above 1% without a (Telescope Lens) Telescope Lens, even if the player has previously entered a Planetarium.
• If the Donation Machine was jammed before usage, it will no longer be jammed.
• If used in a run while achievements and character unlocks are enabled, they will still be enabled after use. Similarly, if these are disabled because the player is in a Victory Lap or seeded run, they will remain disabled after use.
• The timer and score do NOT reset.
  • This means that the timer requirements to access (Boss Rush) Boss Rush, (???) ???, and Broken Shovel do NOT reset.
• Item pools are NOT reset.
• The 13 pill pool does NOT reset, unlike with a victory lap.
• Key Piece 1 and Key Piece 2 may also be obtained again, even if already consumed in (Chest) Chest or (Dark Room) Dark Room to unlock Mega Satan's door.
• Knife Piece 1 and Knife Piece 2 may also be obtained again.
• When used in Ascent or (Home) Home, Isaac will instead be sent to the Ascent version of Chapter 1. However, the run will restart from there (the ascent sequence ends when R Key is used).
• In scenarios where R Key can be purchased, it uniquely costs 99 coins instead of 15.
  • This rule does not apply to the extra shop created by Member Card.
• If Sprinkler is used on the final room in greed mode and the R Key is used, the sprinkler/s will come with Isaac to the starting room.
• In Greed mode, this costs 99 coins.

Interactions

• Book of Virtues: Will spawn a single, normal wisp.
• (Broken Remote) Broken Remote: Isaac will start on a random room on the first floor. This combo can also lead to a game crash.