To even open the Registry Editor, your user needs to have administrative permissions to open it.

It's a pretty straight-forward process.

Firstly, open up the windows search bar and search "Registry Editor".

When you have it opened, it should look something like this:


Now, you need to go to the path Computer\HKEY_CURRENT_USER\SOFTWARE\PlatSTUDIO\Hentai Killer

There are 2 files that we need to change the values of, they are "KilledEnemysCount_h2635144556" and "MultiplayerKillsCount_h303920301"
Changing the values is pretty easy, all you need to do is double-click on one of the files and change the value data you want
(1000 for KilledEnemys ; 100 for MultiplayerKills)

After you've changed the values, it's time to start up the game (the game doesn't have cloud save, so we don't need to do anything extra :D) and get a kill in the singleplayer mode to get the 6 out of 7 achievements.

Though you might need another person for the multiplayer achievement, you don't need to play the full length to get the achievement. Plus, it's 49 cents right now...so what are you waiting for? Invite a friend!