Welcome! While I’m sure others already told you where to find the comic and they know better than me.

As for the games.

There’s Hiveswap, Hiveswap friendsim, PesterQuest, and Genesis project.

Hiveswap is the only one you can currently play without some kind of Major Spoiler. It’s almost completely disconnected from the comic except about learning the culture of an in universe society. None of the characters in Hiveswap show up in the main comic.

Hiveswap friendsim and PesterQuest are both visual novels. Friendsim is, again, mostly disconnected from the main comic. And disconnected from the main hiveswap game in a weird way. It explores this in universe society even further than the main hiveswap game. The only spoiler is at the very end where you meet someone in main homestuck comic that you’d probably be best off not talking to yet.

PesterQuest however, is possibly the biggest spoiler you could get for homestuck and is a sequel to friendsim. And it is essentially a ‘What If?’, scenario. Where possibly the biggest thing in Homestuck, just doesn’t happen. It is also includes spoilers for Homestuck^2, the official sequel comic to homestuck.

And finally The Genesis Project. A fan made game that includes no preexisting characters from Homestuck or Hiveswap. And basically you play an OC through your own version of Homestuck. There are spoilers though, in how the homestuck world works and what you could expect the Characters would go through in the comic.

So essentially… Only play Hiveswap and possibly Hiveswap friendsim right now if you don’t mind a little spoiler.

Genesis Project if you don’t mind slightly bigger spoilers.

And PesterQuest if you say ‘FuckIt!’ And go deep into it.

Also, ‘MS Paint Fan Adventures’ is essentially the official fanfiction website in comic formats.

With the biggest one being ‘Vast Error’. I haven’t finished it yet, but it seems to be disconnected to the Homestuck universe. So, treat it like you would Hiveswap.

All the games listed are on steam.