This Can Be Accomplished In Classic Any/ All.
You Need To Be A Transporter To Net This Achievement.
- A Transporter Can Switch Two Targets At Night.
Easy Way
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There Are A Few Other Achievements Tied To Targeting Yourself, So Announcing That You "Are A Transporter Willing To Help Others" On Day 1, May Get You Some Whispers Asking You To Switch You And Them.
If Someone Needs The "Attack Yourself As Mafia" Achievement, You Both Are In The Clear!
Organic Way
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Make Someone That Is Clearly Evil Angry And Switch Yourself With Them!
If You Successfully Switch, You Will Be Alive And The Achievement Will Pop At The End Of The Game, However A In-Game Pop-up With Confirm That You've Done It.
Good Luck!