Ah, no wonder. Fuck, that seems to be the best showcase had it not been for those bugged saints row ones. I already wondered why that happened..
I want it fixed
Edit: so why would you want over 9000 not on your showcase? Its working correctly, isn't it? What did you have to do for the achievement?
Over 9000 is gotten by reaching wave 10 using only lightning towers. While it is working correctly, I just don't want it to be in my Top 6 (after those SR3 cheevos are fixed). I mean, nothing against the achievement, but I've got better ones I'd rather have showcased.
Caerith is level 11 and got the showcase
I had it since 10. It's buggy, though: it doesn't show up as a selectable showcase for everybody or sometimes it's selectable sometimes it isn't, not sure. Known bug, Valve is looking into it. I'd say just F5 a bunch and see if anything changes.
I got to S1E6 on the Wii version of Sam & Max and it was a great game, which sadly ran like shit on the console. It's not too hard, though I had to use a guide once in Ep. 5, and got stuck in Ep. 6 and stopped playing.
I love its humor, but since I never played the original nor read the comics I don't know how much credit to give TTG.
Sam & Max's creator (mostly), Steve Purcell, was involved with every S&M game ever (including the LucasArts one and the one that never happened), though he only did artwork for Devil's Playhouse as opposed to writing/designing the first two seasons, according to wikipedia at least. He was probably involved with all the machinima too.
All three seasons were scored by Jared Emerson-Johnson, though, earning him multiple Pulitzer Prizes, Nobel Peace Prizes, and Oscars.