Heihachi makes a brief appearance on the Tekken spin-off game Death by Degrees as an optional boss. He also makes an appearance as a playable character in the PS2 version of the fighting game Soulcalibur II.
Heichachi is one of the bonus characters available to play as or against in Anna Kournikova's Smash Court Tennis for the PlayStation (alongside fellow Namco characters) and is an unlockable character in Smash Court Tennis Pro Tournament 2. He also makes guest appearances in the role-playing game Tales of the Abyss (as one of Anise's custom dolls) and in Pac-Man Fever (alongside several other Namco characters).
In the crossover tactical RPG Namco × Capcom Heichachi appears as one of playable characters representing the Namco universe. He also appears in the crossover fighting game Street Fighter X Tekken, with Kuma as his official tag partner. Heihachi's younger incarnation will appear as a playable character in PlayStation All-Stars Battle Royale.