I would probably use both timers for Any% run and IGT for IL runs. IGT only can't be used, because you could basically "cheat" by restarting any challenge as many times you want to get the best IGT, UNLESS we specify that you can't use restarts.

The question is if it's not too hard to complete all challenges in just one attempt. I don't know how long all the challenges takes to complete.

I made it a condition that IGT can only be used without restarts, otherwise RTA will be used. IGT is still the default timer. Not sure how speedrun.com will handle that :) I just think that one-sitting is a bit too harsh for 4 hours long runs.

OR we could set up a different category - good old single-segment.

Maybe IGT should be used for a "Level Leaderboard" where everyone can submit their best time for each challenge. I personally would prefer RTA for one sitting.

Didnt really know that I just did every event before i never did it casually haha :D

The problem is CS has no endgame point, so it's logical to complete everything. If anything, the category should be named "Challenge 68" and put into misc categories imho.

Gives us more info what events can be skipped?

You can check yourself. Some events say this: Unlock this challenge by beating challenge X or X

I wouldn't mind having a 100% CS category next to a regular CS

They give you 68/68 - that's enough for me :P It's not called 100%, because there's no specific beginning and end, except completing everything.

It's hard to define what should be misc category and what not.

What do others think? I feel like creating categories based on some last event/mission just because it would be shorter is weird. I don't recall ever seeing that before, but feel free to post an example.

Actually, GTA: SA has "All missions" category :)