There's two actually and both are pretty niche but I'm proud to have accomplished.

1. I love to surf in CSGO/CSS/Momentum Mod and at the time of writing I'm top 1.4% of a large server on CSGO of people who surf which isn't amazing by any means but feelsgoodman.

2. I managed to finish a 16 star "run" on Super Mario 64 (wasn't fast but was super fun and the child in me was in amazement)

Build machines to build machines

(Applies to at least two games I know)

I think individual threads for each session may be too much for a community this size, perhaps pre-GP and post-GP threads? I've never been one to do much talking during the race but that's probably just me.