Mach 3

DESCRIPTION	POKE(s)
Infinite Lives	24632,195
Immunity	30706,201

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MACH3.SNA

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Macaroid

DESCRIPTION	POKE(s)
Infinite lives	40473,0

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Mad-Man

DESCRIPTION	POKE(s)
Infinite lives	27586,0

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Madhatter

DESCRIPTION	POKE(s)
Infinite lives	48406,0
Need x sweets	53847,x (x = 0-10)
Need x rolls	54785,x (x = 1-5)

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Mad Cars

DESCRIPTION	POKE(s)
Lives = x	46769,x (x = 1-255)
Infinite lives	46833,183

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Mad Caverns (AKA Mad Caves)

DESCRIPTION	POKE(s)
Infinite lives	40445,183

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Mad Mix

DESCRIPTION	POKE(s)
YS DEMO
Infinite Lives	40285,62
Lives = x	39932,x (x= 1-250)
No nasties	33421,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MADMIX.SNA

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Mad Nurse

DESCRIPTION	POKE(s)
Infinite lives	38073,0
Infinite gas	44817,0
Infinite babies	45198,0

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Mag Max Robo Centurion

DESCRIPTION	POKE(s)
Infinite Lives	58472,183

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MAGMAX.SNA

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Maggot

DESCRIPTION	POKE(s)
Immunity	31507,0

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Magic Carpet

DESCRIPTION	POKE(s)
Infinite lives	29530,0
Score never decreases	31018,0
Immunity	30955,58

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Magic Fields

DESCRIPTION	POKE(s)
Infinite time	34495,0

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Magic Land

DESCRIPTION	POKE(s)
Infinite lives	49917,0

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Magic Meanies

DESCRIPTION	POKE(s)
Infinite lives	28165,183:30096,183

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Magic Roundabout

DESCRIPTION	POKE(s)
Infinite lives	32357,0
Infinite sugar	32208,0

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Magicland Dizzy

DESCRIPTION	POKE(s)
Infinite Lives	29623,182
Walk through walls	41179,201
Tune continues when dead	29611,58
Play at double speed	40536,1

LOAD FROM RETRO GOLD ... retro:games/spectrum/d/DIZZY_4.SNA

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Maglaxians

DESCRIPTION	POKE(s)
??????????????	59354,7
Room = x	59354,x (x= 1-??)

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

If anyone finds out if this works, let me know

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Magnetron

DESCRIPTION	POKE(s)
Infinite Lives	42671,235:42672,160

I'm pretty sure this infinite lives POKE works. All it does is stop the game jumping to the Game Over sequence, and you end up getting transported to another place. I can't really play the game that well, so I haven't been able to bug-test it (like making sure none of your work is undone). If it works, cool. If not, don't blame me.. I didn't crack it, OK?! (but let me know anyway)

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Maniac

DESCRIPTION	POKE(s)
Infinite lives	55823,0

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Manic Miner

(Also works for Manic Miner 2,3,4,5 and Buddah of Suburbia)

DESCRIPTION	POKE(s)
Infinite Lives	35136,0
Infinite Oxygen	34798,0:34799,0:34800,0
No Collision	36106,0 (36107,107 to disable this POKE)
No Horizontal Nasties	36160,0
Mystery POKE?	35160,0
Alter Enemies	36150,0

The "No Collision" POKE is a bit dodgy. Not only does some of the screen flash if you do hit a nasty, but if you fall from a distance, you end up stuck beneath the floor with no way to escape!
If you do get stuck, use the "Disable" number listed next to the POKE, and you will die as normal. Then you can re-activate the POKE again if needed.

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MANIC.SNA

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Mantronix

DESCRIPTION	POKE(s)
Infinite Lives	46175,0
Immunity	46001,61
Lives = x	45971,x

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MANTRON.SNA

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Manzana

DESCRIPTION	POKE(s)
Infinite lives	38459,0

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Marauder

DESCRIPTION	POKE(s)
Infinite Lives	35160,175:35161,50:35162,95:35163,250
Infinite Smart Bombs	34225,0
All die instantly	34219,0:34225,0:34230,0
Lives = x	26178,x (x= 1-100)
Smart Bombs = x	26183,x (x= 1-100)

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

The All Die Instantly POKE makes everything blow up as soon as it scrolls into view. Makes the game UTTERLY pointless!

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MARAUD.SNA

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Marble Madness Construction Kit

DESCRIPTION	POKE(s)
Infinite time

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Marble Madness Deluxe

DESCRIPTION	POKE(s)
Infinite time	38400,0

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Mario Bros

DESCRIPTION	POKE(s)
Infinite Lives	44079,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MARIOB.SNA

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Marsport

DESCRIPTION	POKE(s)
No Heralds & Wardens	34379,24
No Sept's Warrior	34057,201
No Sept's Leaders	43865,24
Unlock Doors	36607,24:36587,24:44955,24

Since I have NO idea how to play these types of games, I can only guess that these POKEs actually work.. If anyone finds out one way or the other, let me know

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MARSPORT.SNA

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Martianoids

DESCRIPTION POKE(s)

Infinite Lives 46793,0

Infinite Battery 40548,201:43218,0:43826,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MARTIANO.SNA

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Mask 1

DESCRIPTION POKE(s)

Infinite Fuel & Armour 43081,201

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Master, The

DESCRIPTION POKE(s)

Infinite lives 32773,0

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Master Of Magic

DESCRIPTION POKE(s)

Infinite body 43226,0

Infinite mind 43251,0

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Masters Of The Universe - The Movie

DESCRIPTION POKE(s)

Infinite Lives 42173,0

Immunity 51406,0

Slows Clock 52346,60

One Ghost 43210,1

No Chords 41420,175:41421.0

Lives = x 41274,255

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

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Match Point

DESCRIPTION POKE(s)

Move much faster 53646,0:53657,0

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Max Headroom

DESCRIPTION POKE(s)

Infinite Energy 31391,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/h/HEADROOM.SNA

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Maze Chase

DESCRIPTION POKE(s)

Infinite Lives 34248,0

Lives = x 34301,x (x= 1-255)

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MAZCHASE.SNA

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Maze Death Race (AKA Autolabyrinth)

DESCRIPTION POKE(s)

Infinite lives 24249,0

Immunity 24927,201

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Mazemania

DESCRIPTION POKE(s)

Infinite Lives 42962,0

Infinite Energy 42582,0

Jump On Aliens Anytime 49258,0:49399,0

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Mega Apocalypse

DESCRIPTION POKE(s)

Infinite Lives 23578,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/M_APOCAL.SNA

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Mega Nova (Part One)

DESCRIPTION POKE(s)

Infinite Lives 32382,0

Lives = x 31705,x (x= 1-255)

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MEGANOVA.SNA

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Megablast

DESCRIPTION POKE(s)

Infinite lives 38059,0

Infinite smart bombs 38589,182

Immunity 37652,201:38494,201

Hostages = x 36443,x (x = 1-16)

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Megabucks

DESCRIPTION POKE(s)

Infinite Energy 38154,0

Infinite Time 37460,0

Infinite Phone Credits 38154,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MEGABUCK.SNA

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Megapede

DESCRIPTION POKE(s)

Infinite lives 27545,0

Immune to birds 30835,195

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Melt Down

DESCRIPTION POKE(s)

Infinite lives 49270,0

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Mental Block

DESCRIPTION POKE(s)

Infinite Lives 37159,0

Infinite Time 36409,0

1 Tile Needed 35845,0

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Merlin (AKA El Mago)

DESCRIPTION POKE(s)

Infinite Lives 36562,182

Infinite Energy 38385,201

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Metal Army

DESCRIPTION POKE(s)

Infinite Lives 42198,0

Infinite Ammo 48518,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/METAL_AR.SNA

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Metaldrone

DESCRIPTION POKE(s)

Infinite lives 47035,0:48932,0

Infinite time 46657,0

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Metaplex

DESCRIPTION POKE(s)

Infinite laser 39691,0

Infinite acid 36778,0

Infinite shield 36536,201

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Meteor Storm

DESCRIPTION POKE(s)

Infinite Lives 31086,182

Lives = x 29976,x (x= 1-255)

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/METEO.SNA

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Metro-Cross

DESCRIPTION POKE(s)

Infinite Time 43006,195:44490,0

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Metropolis

DESCRIPTION POKE(s)

Infinite Energy 59572,0:61058,0

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Miami Chase

DESCRIPTION POKE(s)

Infinite lives 34056,183

Infinite time 41440,183

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Miami Cobra GT

DESCRIPTION POKE(s)

Infinite Time 40984,48:42417,0

Infinite Turbos 43130,0

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Mickey Mouse

DESCRIPTION POKE(s)

Infinite Lives 36520,0

Infinite Shields 40058,0

Water 40814,201

Slow 40012,0

Bolts 40035,0

Bird's Head 40091,0

Glue 40114,0

Repulsive 40137,0

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Microball

DESCRIPTION POKE(s)

Infinite balls 42307,0

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Microbot

DESCRIPTION POKE(s)

Infinite lives 55831,0

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MicroMouse Goes Debugging

DESCRIPTION POKE(s)

Infinite lives 28980,62

No nasties 32500,201

Infinite datakill 29640,0

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Micronaut One

DESCRIPTION POKE(s)

Infinite Energy 34650,0:34651,195

Turn at speed 52004,0:52005,0

Turbo accelerator 52150,81

Super brakes 52163,62

Smooth Walls 52591,0

Clouds = Energy 34768,107

Energy = x 33370,x (x= 1-255)

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

All of these POKEs work as far as I can tell, but then I can't play this game anyway :)
If anyone finds out if this works, let me know

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Midnight Resistance

DESCRIPTION POKE(s)

128K

Infinite Lives 36633,0

Infinite Weapons 40131,0

Infinite Backpacks 40152,0

Infinite Keys 47577,0:47578,0:47579,0

48K

Infinite Lives 36480,0

Lives = x 31760,x (x= 1- 255)

Infinite Weapons 39975,0

Infinite Backpacks 39996,0

Note the "Infinite Weapons" POKE only works once you HAVE the weapons.

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Mig 29 Soviet Fighter

DESCRIPTION POKE(s)

Infinite Lives 34379,24

Infinite Bullets 40884,0

Infinite Fuel 52449,0

Infinite Bombs 38634,0

Infinite Seekers 41216,0

Infinite Rockets 39256,0

LOAD FROM RETRO GOLD ... retro:games/spectrum/s/SF_MIG29.SNA

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Mig Busters

DESCRIPTION POKE(s)

Infinite Lives 39223,0

Infinite Ammo 39819,0

Infinite Energy 49737,0

Lives = x 39319,x (x= 1-255)

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MIGBUSTR.Z80

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Mikie

DESCRIPTION POKE(s)

Lives = x 46259,x (x= 1-255)

Infinite Lives 40843,182

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MIKIE.SNA

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Millimon

DESCRIPTION POKE(s)

Infinite lives 24456,0

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Millipede

DESCRIPTION POKE(s)

Immunity 25101,0

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Mimzoid Death Dude

DESCRIPTION POKE(s)

Infinite energy 45310,42

Infinite time 38581,42

You will have to deactivate the infinite time POKE when you complete the shooting levels, otherwise it will sit in a loop. Do this by entering POKE 38581,34

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Minder

DESCRIPTION POKE(s)

Infinite money 43673,180

Infinite time 27602,182

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Mission Collision

DESCRIPTION POKE(s)

Infinite lives 43572,0

Infinite fuel 44259,0

Immunity 43567,24

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Mission Elevator

DESCRIPTION POKE(s)

Infinite Lives 48724,0

Infinite Time 49855,0

Change x to whatever value you wish, using the POKE option on the ZXAM GUI

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/M_ELEVAT.Z80

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Mission Fallout

DESCRIPTION POKE(s)

Infinite lives 26717,0

Infinite energy 28312,0:37235,0:49465,0:58464,0

Infinite time 47251,0

Infinite platforms 28859,0

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Mission Impossible

DESCRIPTION POKE(s)

Infinite lives 25758,0

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Mission Jupiter

DESCRIPTION POKE(s)

Infinite Lives 60468,0

Infinite Fuel 57806,0

Infinite Ammo 58322,0

Immunity 58534,201

No Enemies 50964,201

Move anywhere 57774,189

No Alien Fire 58329,201

Mega Laser 58312,0:58254,0

Lives = x 60266,255

Autofire 58254,0

Immune Aliens! 58659,201

I don't know if the "No Enemies" POKE works or not, but they all still seem to be there at the early stages of the game. I also don't know what "Move Anywhere" does. If anyone finds out, let me know

LOAD FROM RETRO GOLD ... retro:games/spectrum/m/MISSIONJ.Z80

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Mission Ninety One

DESCRIPTION POKE(s)

Infinite Lives 25745,0:25752,0:25753,13

LOAD FROM RETRO GOLD ... retro:games/spectrum/M/MSSION91.SNA

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Molar Maul

DESCRIPTION POKE(s)

Infinite lives 24912,182

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Molecule Man

DESCRIPTION POKE(s)

Infinite Time 64585,0

Infinite Money??? 64622,0:64623,0:64624,0

If anyone finds out if this is correct, let me know

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DESCRIPTION	POKE(s)
Infinite body	43226,0
Infinite mind	43251,0

DESCRIPTION	POKE(s)
Infinite Energy	38154,0
Infinite Time	37460,0
Infinite Phone Credits	38154,0

DESCRIPTION	POKE(s)
Infinite laser	39691,0
Infinite acid	36778,0
Infinite shield	36536,201

DESCRIPTION	POKE(s)

128K
Infinite Lives	36633,0
Infinite Weapons	40131,0
Infinite Backpacks	40152,0
Infinite Keys	47577,0:47578,0:47579,0

48K
Infinite Lives	36480,0
Lives = x	31760,x (x= 1- 255)
Infinite Weapons	39975,0
Infinite Backpacks	39996,0

DESCRIPTION	POKE(s)
Infinite money	43673,180
Infinite time	27602,182