| Obstacles |
| Rocks | Poops | Fire Places | Cobwebs | TNT | Spikes | Blocks |  Buttons
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 Dirt Patches
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 Teleporters
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This article is about the floor-based spike hazards. For the spiked, ball-like hazards, see Spikeball. For the active, enemy-like hazards, see Poky.
- Can be walked over, but will damage Isaac in the process.
- Deal one heart of damage upon contact with the player (unless the player has
Callus, Orphan Socks, the ability to jump, or flight to avoid being damaged). Non-flying enemies take 8 points of damage.
- Sacrifice room spikes will damage Isaac and enemies even with flight ability.
- They can be deactivated with Pressure Plates.
- Will Retract if Isaac holds Flat File, even if they're sacrifice room spikes.
Retractable Spikes[]
- Retract and extend on timers.
- Can be walked over safely while they are retracted.
- Deactivates when all Pressure Plates are pressed.
Gallery[]
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Sketches of monsters for the Binding of Isaac: Rebirth, including the Retractable Spikes in the bottom square of the fourth row, formerly called "On/Off Tiles." Despite technically being an obstacle, the concept art groups it with monsters.
 The Binding of Isaac: Rebirth
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