Oooh, those are good!! I’d definitely like a cheeky game badge 
Just spitballing some random ideas here:
making new friends
We’re pretty darn good at welcoming newbies otherwise I’d suggest something that encourages people to respond to the “introduce yourself” posts.
social butterfly
We’re also pretty good at chatting to lots of people, but maybe you could get a badge when you’ve mentioned X number of new individuals by tagging them - but perhaps that’s only useful where people for cliques, and I don’t think we do!
tried and tested
If the review side of things gets fully incorporated then it might be nice to eventually have badges for numbers of reviews (maybe 25/75/150?) and maybe also for if people find your review helpful (say if 10 people say it was helpful, you get a helpful badge)?
ambassador
I guess this one more thinking of what LH’s needs are for the forum - but recommending/favourably linking to LH products, or posting images of eg LH lingerie on real people. It’s helpful for us too to see people’s experiences - though again I think we all do a lot of sharing of LH stuff anyway!