Start a new Campaign (after completing the tutorial).
From the main menu, press: Campaign -> New Story -> Skip Tutorial -> Start
After you load in and have control of your character, check the box next to "Enable Achievement Unlocker".
Proceed to the Quest marker until you get to the village under attack.
Check the box next to "Get Kill Count".
Check the box next to "Get Achievement ID".
Kill 1 Piglin to populate the values.
Check the box next to "Set 999 Kills".
Check the box next to "Achievements".
Check the box next to the achievement you want to unlock.
Kill 1 Piglin. Achievement will unlock. **
Repeat Steps 10-11.
* I DO NOT recommend doing this anywhere other than the first village in a new game.
You do not want your friendlies getting a kill, because that will trigger achievements! Also do not spawn anything! ** Achievements can be delayed by 30 seconds.
If they completely stop unlocking, relaunch the game and start a new campaign.
How to use this cheat table?
Install Cheat Engine
Double-click the .CT file in order to open it.
Click the PC icon in Cheat Engine in order to select the game process.
Keep the list.
Activate the trainer options by checking boxes or setting values from 0 to 1
Works great! And good thing too, this game is really not that fun. I didn't know what to expect but yeah, not so fun.
Edit: Legit Achievement list with timestamps taken from the top user on XboxAchievements site. Everything excluding the Legendary Campaign achievement should take approximately 20hrs. You can unlock the Legendary achievement at the same time as the final boss "The Great Hog" or not, up to you, but most people on TA didn't do a Legendary run their first go and nobody tracked on XboxAchievements even has the Legendary completion at all. Spoiler
I'm reluctant to start this as it doesn't look the best and I imagine MS are going to monetize it heavily with dlcs like Dungeons.
Nice to know this exists as a backup for the original 1000 if I do. Thanks SvT