So I went to the slayer machine and, on my very first try, got the 777 achievement. However, it struck me that since I didn't have the other one yet (Lemon Lemon Lemon), shouldn't that have triggered too? Winning big is, by definition, winning something.
I got Lemon Lemon Lemon on the next try, because apparently the slot machine likes me, but it's weird that I had to go back and get it. Is this intended behaviour or a bug?