Angry Red Button is an active item in Battle Fantasy, a mod for The Binding of Isaac.

Kills all enemies and destroys all projectiles in the room, but has a chance to backfire and hinder Isaac instead, based on the button's "Anger Level".

The button starts off at 2 Anger (1 Anger if the item has never been used in the current savefile), and increases by 1 every time it's used. Upon entering a new floor, the button's Anger Level decreases by 66.67%, then is rounded down.

The chance for the button to activate a negative effect is equal to (AngerLevel + 1) * 0.08, and is capped at 88%.

Possible negative effects include:
• Spawning 6 Troll Bombs.
• Activating a negative pill. Items that alter the pill pool to have positive pills, like PHD, will not convert the activated pill.
• Removing itself from the player's active slot and spawning in a random location of the room.
• Adding Curse of the Blind.
• Rerolling all enemies in the room.
• Respawning the strongest enemy previously killed by the button's positive effect as a champion enemy.
• Spawning 10 Buttons, which need to be pressed to complete the room.
• Converting half of the rocks in the room into Spiked Rocks.
• Converting all enemy projectiles in the room into homing projectiles.
• Removing 2 of Isaac's red heart containers and spawning Thunder Thighs.
• Removing up to 10 of Isaac's coins and spawning penny pickups that fly out quickly, disappearing after 2.5 seconds.
• Activating a consumable Isaac is currently holding, consuming it in the process.
• Spawning 2-4 Bulbs.
• Spawning an Eggy that is immediately killed.
• Removing a random item held by the player, replacing it with a Quality 0-2 item from the Treasure Room pool. The item removed has a higher chance to be a held item that was collected from the Secret Room pool.

Angry Red Button can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Angry Red Button have been documented.

* Note that not all possible synergies and interactions are listed here.

• Download Battle Fantasy from the Steam Workshop.