This is a play-through of Arcade Mode using Heihachi Mishima in the PS1 version of Tekken 1. Read on below for more information...
Heihachi is the final boss in the game. He is an unlockable playable character in it.
===== HOW TO UNLOCK HEIHACHI =====
Beat Arcade Mode without using any Continues. You can do this with any character and on any difficulty setting.
===== ABOUT HEIHACHI =====
Ever since his debut in Tekken 1, Heihachi has gone from strength to strength in the series, being one of only four characters in the franchise to appear in all 7 games up to this point (at this time of writing). He is one of the originals and definitely a staple of the series.
===== GAMEPLAY =====
He is basically a more powerful version of Kazuya with better versions of his moves, along with Paul's hammer and Phoenix Smasher. In the PS1 version of the game he is more "individual", with extra unique moves of his own (such as his throws, extra hell sweeps, a possible anti-clockwise run at the end of his dash backs, a jumping double kick, etc.); whereas in the Arcade version he was almost an exact clone of Kazuya moves-wise.
===== ADDITIONAL INFORMATION =====
---- When playing through Arcade Mode with him, he is the only character in the game where all of his CPU opponents up to Stage 8 are of the sub-bosses.
---- He is also the only character in the game to not have Heihachi as the final boss, but instead have "Devil Kazuya" as his final boss.
---- His character select screen portrait image is completely different to the one in the Arcade version.
===== ABOUT PS1 TEKKEN 1 =====
This version of the game is virtually arcade perfect, even bettering the Arcade version in a lot of ways, such as:
1) The sub-bosses and Heihachi being made to be unlockable playable characters.
2) Extra new and unique moves for the sub-bosses.
3) FMV endings for the regular characters.
4) A new alternative costume for each of the sub-bosses.
5) Offering an excellent Arranged soundtrack.
The minor downside however is that the character portraits on the select screen are static when you select/confirm them, unlike in the Arcade where they had some animation. I imagine that when this game came out to the PS1 in 1995, players must have been overjoyed to have the opportunity to play a "better-than-the-arcade-version" game in their own home.