If you do the health/armor cheat, it only blocks the "cleaned the mean streets" achievement for that gaming session. Restart the game from your last save, even if you used the cheat right before you saved, and you can get the achievement, as long as you don't use the cheat when you kill your 20th criminal.
I finally got around to getting the achievement today, and I must have used the health/armor cheat about 120 times. (the cheat is faster than finding food/hooker/gun shop, plus I flat out like cheating, and it heals your car if you're in one, lol..)
I read somewhere the same is true for the other achievements that get blocked when you cheat, but I haven't confirmed them, probably true though.
I finally got around to getting the achievement today, and I must have used the health/armor cheat about 120 times. (the cheat is faster than finding food/hooker/gun shop, plus I flat out like cheating, and it heals your car if you're in one, lol..)
I read somewhere the same is true for the other achievements that get blocked when you cheat, but I haven't confirmed them, probably true though.