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| 1982

Release type:
Units produced: Stern
Controls/Input Device: Control(joy8way), Buttons(1)
Number of Players: 2
More Creator:
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License from/Copyright:
SoundMix: Mono
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Frenzy VGMuseum Game Endings
Frenzy on CAESAR
Frenzy high score and replay at MARP
Frenzy on datObase
MAME folder name: frenzy

Display: raster 256x224 @ 59.64Hz (59.64 pixclock)
Sound: 1 channels

Emulated in MAME via driver berzerk.c:
Status: good; Emulation: good
Graphic: good; Sound: good; Color: good
Palette size: 0; Savestate: unsupported

1c with 2048kb
sha1:f12fed8712f20fa8213f606c4049a8144bfea42e crc:2cfe825d
1c-0 with 4096kb
sha1:e6a3ab826b51b2c6ddd63d55681848fccad800dd crc:abdd25b8
1d-1 with 4096kb
sha1:913385c43b8902d3d3ad2194a3137e19e61c6573 crc:536e4ae8
2c with 2048kb
sha1:20a6611ad6ec19409ac138bdae7bdfaeab6c47cf crc:d2b6324e
3d-2 with 4096kb
sha1:1e43e76ae0606a6d41d9006005d6001bdee48694 crc:3eb9bc9b
5d-3 with 4096kb
sha1:2af4a9bc2b29735a548ae770f872127bc009cc42 crc:e1d3133c
6d-4 with 4096kb
sha1:1f633c1c29d3b64f701c601feba26da66a6c6f23 crc:5581a7b1
prom.6e with 32kb
sha1:ba8dca2ec076818f8ad8c17b15c77965e36fa05e crc:4471ca5d
Mameinfo.dat entry:
0.37b10 [Yochizo]


- 0.147u2: hap fixed clone Omega Fighter Special. The game fails to boot or finish post. After showing bad rom errors, the game resets.

- 0.147u1: Fixed maincpu rom loading.

- 0.122u7: Fixed gfx1/2/3/4/5 rom loading.

- 0.89u3: Changed Z80 CPU2 clock speed to 5MHz.

- 0.37b10: Yochizo added 'Omega Fighter' (UPL 1989) and clone Omega Fighter Special.

- 21st November 2000: Yochizo fixed some graphics bugs in the Omega Fighter / Atomic Robo-kid driver.

- 8th November 2000: Yochizo sent in a driver for Omega Fighter and Atomic Robo-kid.

- 25th April 1999: Dumped Omega Fighter Special.

LEVELS: 8 (restarts once)

Other Emulators:

* FB Alpha


* Raine

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Romset: 2016 kb / 8 files / 457.8 zip

Credits Mameinfo and Mametesters Project Robert J. Rabgno et al.
History.dat entry:
Frenzy (c) 1982 Stern.

A sequel to the 1980 game, "Berzerk", Frenzy once again has the player battling through a maze of rooms, populated by robotic skeletons, robotic octopi and walls. Everything in each room, except walls is deadly to the touch.

The object is to shoot all the robots, and then escape out of the room through one of the doorways. Like its prequel, Frenzy consist of 64000 levels. Once all 64000 have been cleared the game will crash.


The Frenzy cabinet had a patented pull-out drawer that allowed access to the game's circuit boards from the front of the cabinet. Frenzy machines are bright orange, and are not as cool looking as "Berzerk" machines were. The graphics are mostly done in blue, yellow, and orange, and are just simple designs for the most part.

This is technically a monochrome game. It uses a special 'color overlay' circuit board to add color to the games graphics before they go to the monitor. A side effect of this is that walking very close to a wall, robot, laser blast, etc, will cause part of that object to change to your color.

Main CPU : Zilog Z80 (@ 2.5 Mhz)
Sound Chips : Custom tone generator, custom LPC speech synthesis chip

Players : 2
Control : 8-way joystick
Buttons : 1


Frenzy was released in May 1982.

Frenzy speaks to you as you play. It has a voice synthesizer that spouts little phrases. These were done in a monotone computer voice, which was difficult to understand when combined with other in-game sounds (The voices were actually done using LPC encoding, which cost $1000 per word back in 1980). These phrases were also translated into several European languages (Spanish, French, and German) for release in Europe.

In Frenzy, however, the robots are nowhere near as chatty. They only speak in a few specific situations. See "Differences from Berzerk" below for full details.

Mark Smith holds the official record for this game with 4804540 points.

* In "Berzerk", the walls are all solid. In Frenzy, some of the walls of the maze are composed of 'dots' which can be shot. This opens up strategies such as blasting a hole in the side of a room to escape when in trouble. The solid walls, on the other hand, now reflect shots. You can trick robots into killing themselves by standing on the opposite side of a reflective wall and letting them shoot themselves. The only wall that simply absorbs shots harmlessly as in the original is the closed door that appears behind you when you enter a new room.

* Neither type of wall is electrified, and so you can touch them without dying. On the other hand, you also usually can't kill robots by tricking them into walking into the now-harmless walls. In addition, you can no longer die by touching the robots or their explosions. Only their shots can kill you (though the blast radius from an exploding robot can kill you). There are two types of robots: skeletons and tanks. The two types have identical AI, but the skeletons are more difficult to shoot from above or below (because they're so thin).

* In "Berzerk", Evil Otto was unkillable and unstoppable. In Frenzy, where he's known as Crazy Otto, shooting him once changes him from a smiley face to a 'neutral' face, and another shot converts him to a 'frowny' face. Another shot kills him. However, killing Crazy Otto makes him a little bit faster the next time he appears, which is usually immediately.

* Every four mazes, there are seemingly decorative elements in Frenzy that don't exist in the earlier game. For example, in one room is a huge statue of Otto called Big Otto. Each one has a specific effect on game-play for that one room. The order is : Big Otto, Power Plant, Central Computer, and Robot Factory. The Power Plant and the Central Computer are surrounded by walls made entirely of 'dots', while Big Otto and the Robot Factory are surrounded by reflective walls with only one breakable 'dot' in the corner, making them more difficult to hit.

* In the Power Plant room, shooting the power plant once will disable it, and all robots in the room will stop moving. In the Central Computer room, shooting the computer will cause all the robots to start moving and firing erratically. While they're in such a state, the walls can kill them. The Robot Factory will continue to spit out additional robots while you're in the stage, taunting you as it does so. Shooting the factory has no effect.

* In the Big Otto room, if you kill Crazy Otto, not only does he immediately respawn as usual, but Big Otto will spawn four more Crazy Ottos (as depicted in the cabinet's sideart image) and sends them at you; the spawned Crazy Ottos all move at top speed. Like the Robot Factory, shooting Big Otto has no effect. Big Otto starts out with closed eyes and a neutral expression, but his expression changes to one of rage, with glowing red eyes and a frowning mouth, when you kill Crazy Otto. He also smiles when you die, though his eyes remain the same as before, either closed or open.

* Finally, the robots are nowhere near as chatty. They only speak in a few specific situations. They say 'Robot, attack!' when Crazy Otto appears, 'Charge...attack...shoot...kill...destroy!' when you kill Crazy Otto and he respawns, 'The Humanoid must not destroy the robot!' when entering the Big Otto room, 'Where is the Humanoid?' when shooting the Central Computer, and randomly alternates between 'A robot must get the humanoid' and 'A robot is not a chicken' when the Robot Factory dispenses a new robot. The constant background chatter of the original game is gone.


Robots Killed (by you, another robot, or Crazy Otto) : 50 points.
Wall Dots Shot (by you or a robot) : 1 point.
Crazy Otto : 20 points per hit.
Bonus For Killing All Robots : 10 points per robot killed.


1. Berzerk (1980)
2. Frenzy (1982)


Designed & programmed by : Alan McNeil


* Consoles :
Colecovision [US] (1982) "Frenzy [Model 2613]"


Edit this entry: http://www.arcade-history.com/?&page=detail&id=876&o=2

Licensed from Alexis Bousiges under a CC Attribution 3.0 License
cheat.dat entry:
00000000 400C 00000006 FFFFFFFF Infinite Lives
20800000 0C26 00000017 FFFFFFFF Invincibility
20810000 0C29 000000BB FFFFFFFF Invincibility (2/3) 1st & 2nd = Fire
20810000 1521 000000C9 FFFFFFFF Invincibility (3/3) Enemy
00000000 4010 0000000F FFFFFFFF No Evil Otto
00000000 400E 00000000 FFFFFFFF Robots Don't Fire

Credit Pugsy's MAME Cheat file