PONG is an unlockable challenge in The Binding of Isaac, added in the Afterbirth+ DLC.

This page shows information as of the latest Repentance release.
To see latest up-to date information about this challenge for the new Repentance+ (Online Co-op) DLC, check this page instead.

Cupid's Arrow
Rubber Cement

Note: this list does not include characters' default starting items.

0.2 minimum fire rate.
damage cannot go below 100.
+10 range.

Based on the rules set in the .xml file, the following special rooms are disabled during this challenge:

The following is unlocked for completing the PONG challenge: Greed's Gullet

Defeat Isaac 5 times.

• Check out the challenge description on the external Isaac Wiki.