I honestly didn't think of one, the same way how BW and Eden don't... But hypothetically, if he did, it would have to be you shooting him point blank after defeating him ten times total... I'll have to write this out as passages so you can see my vision, but yeah! Additionally, you won't be able to romance Eden if you kill Adam. Which, worry not, because Adam is only dismissible if you don't have the Stockholm Syndrome: Eden trait yet, meaning that you're not dating Eden when you can kill Adam. Hope this makes sense! Sorry if my explanation is clunky, haha...