Wiki guides and youtube videos are available, fine, but asking me to alt tab and watch a 10 minute video while my friend stands around doing nothing is a bit much. .
I'm not asking you to alt-tab and watch a 10 minute video... I'm not actually
asking you to do anything... I'm simply stating how I completed it and maybe you too can consider doing it that way. there's like 7-8 tests to choose from. Best thing to do is use the wiki to find which one you're most interested in doing.
As far as the challenges I did:
The stealth test... whatever video you'd watch would be under a minute. It's really short you just need to know where it starts/finishes and then dodge some lasers. If you have multiple players I think you might be able just simply have one person stand at the end and one of you stand on the activation plate and complete the test immediately. I soloed it so I'm not 100% sure on that.
As for the agility test... You'd alt-tab out and read one sentence of text telling you what to shoot then jump on the correct spot (albeit youd do this like 5 times). That's it though... there's not really an extended, long alt-tab process or anything. But yea I believe it's mostly designed for 1 player.
I very recently did all this content myself as far as the quests and unlocking nodes goes so it's fresh in my mind how ridiculous it all seems... but once you've completed it you end up thinking "oh that was actually really simple." Like I said in my first post the most annoying part for me was definitely just finding the rooms.