If you can't imagine cool Brain Vaults, that isn't my fault.
Also, security/defense would fall under Bunker Support Systems, which I just stated.

Huh, i just thought of it being a Brain Vault with an impenatrable door

I guess there could be way more than that like turrets popping from the floor and throwing high caliber rounds at intruders...

ON TOPIC!

Ive got some kewl GUIs in the works

Huh. Could have sworn Zalo named the theme and it was wildlife at one point, or did that not go ahead?
Brain vaults could work well. It would be all final boss battle, which could get pretty rad. Or lame, depending on how many people entered

Oh god artillery would be good.

Not so keen on gore, funny hats, or sports, though.
I mean, how much can you do with gore? Individual eyeball attachables?

Get shot in the stomach and watch your guts spill out

If you can imagine the body part, you can sprite it and make it into a gib, and place it, and watch it fall out.
Gore as a contest thought would I imagine be more about making an actor/weapon that involves creating lots of gore, like a wood chipper for clones, or a giant clone juicer. Pretty much any giant kitchen/food prep appliance re-purposed for killing would suffice.

WILL IT BLEND? - Green clone