##
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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