Patient Gamers

As a fallback, you could also have some hotseat games. Was recently thinking of HedgeWars again, which is basically open-source Worms Armageddon.

https://hedgewars.org/about.html

Tabletop Simulator is always my go to for big group local co-op (I believe it supports up to 10 players.) Pico Park 2 might be more akin to what you're looking for.

You can also check co-op.gg and filter by storefront, #of players, local, online, etc to see what results they give you! Just double check the game's individual chart to make sure the local co-op limit.

Screencheat has up to 8 player support and is exactly its name.

I believe TMNT shredder's revenge goes up to 6, beat'em up style game: https://store.steampowered.com/app/1361510/Teenage_Mutant_Ninja_Turtles_Shredders_Revenge/

For 8 specifically I can only think of pico park 1 and 2

Jackbox games of course. There’s also Genital Jousting.

I'm pretty sure there's a specific Bomberman console release you can emulate with 8 players.

You could also emulate Smash Bros Ultimate, as it has 8 player support. Might be boring to just play a Switch game many people have though. Maybe look into mods for it?

And you can always use co-optimus to search for stuff. Just set At least 8 players, couch co-op in the filters: https://www.co-optimus.com/system/4/pc.html

• Towerfall 8-player
• Raining Blobs
• Some versions of Bomberman go up to 8 players

Pico Park is fun. https://www.co-optimus.com/game/7748/pc/pico-park.html

TowerFall, Samurai Gun, Mount Your friends, Genital Jousting, starwhal, duck game, crawl, gang beasts, lethal league, magica, Monaco, nidhogg, wobbly life, tmnt splintered fate

I think most of those only go to 4, some to 2.

Pretty sure Clusterpuck '99 on Steam supports up to 8

bro force

I think Brawlhalla supports 8 players

Sackboy a big adventure