Good couch co-op sale finds?

I don't do co-op much anymore, but I used to play Sackboy with my younger brother several years ago and remember having fun. Have you played it? The graphics look cleaner and more colorful and detailed.

I play couch-coop (or nowadays Steam Remote Play Together) with my kids, colleagues and friends (in three different groups, each having different tastes) all the time for many years now.

We have made lists of currently about 2.300 Steam games that support local 4-player and a list with over 650 good local 2-player games. I would post a link here, but then the mods would most likely suspend me for violating the rules and spamming or whatever, so I will just tell you to go to my steam profile for the links if interested. Be warned, though - too much choice can be overwhelming.

Most of the games I've played with others are more couch vs/party rather than couch co-op
Nippon Marathon
Boomerang Fu
Marooners

But for co-op games, maybe you could try the Trine games?
Also Moving Out
Unravel 2 Not on sale, unfortunately.

And was tempted to pick this one up My Singing Monsters Playground in this sale. The gameplay looks a lot like Marooners, above.

so, that's a few anyway that I can think of, quickly.
Used to play a bit of these 2-4 player, but not so much anymore.

https://store.steampowered.com/app/850320/PHOGS/
I played this one long back thanks to the Cozy thread via TragicBronson himself. I always felt it would be best as coop rather than solo. Cyrrently, not on sale, but frequently is.

https://store.steampowered.com/app/336440/Super_Cane_Magic_ZERO__Legend_of_the_Cane_Cane/
and
https://store.steampowered.com/app/1306720/Mayhem_Brawler/
are historical low priced if I am not mistaken and both seem fun.

I would also suggest https://store.steampowered.com/app/1135230/Ember_Knights/ that I have enjoyed with my kids and they liked Boomerang Fu also that has already been mentioned.Trine series is really great as well if you into that kind of coop gaming.

I +1 on the trine proposal !
Tricky towers is a basic in my household, even if my boyfriend is way better
ultimate chicken horse is super dumb but really funny
Use your word too
Brawlhalla is free and a good smash bros counterpart
ibb & obb is cute
heavenly bodies for some ragdoll insanity
Bread & Fred even it's a bit hard maybe
Lego games are always a good choice, it's some harmless fun
Death squared for some brain juice
It takes two of course, maybe hard for a kid
Towerfall ascenscion and nidhogg is he's not afraid of pixel art

Haven't played it myself, but Pitfall Planet has been on my radar for ages, it's extremely highly rated and very cheap.

Personally I'm a big fan of Lovers in a Dangerous Spacetime too.

Chariot is also great fun.

I play a lot of couch coop with my kids. Overcooked was a bit too hard and hectic for them after the first few levels. Games I can recommend:

Bopl Battle

This is probably the best PvP local coop game I've ever played. It's so much fun with all the different abilities you can use. And for some reason it doesn't make you feel bad if you lose because a lot of stuff happening is hard to control perfectly, so even if you are a good player you will occassionally lose. And there are often ridiculous situations that make you laugh out loud even if you lose.

Boomerang Fu

A close second when it comes to PvP games. But this one can also be played as a team versus bots. Lots of fun.

Gauntlet Slayer Edition

A great coop action game that has just the right difficulty if you play it with kids. Can't remember, I think there are more hardcore difficulties you can choose from, but the regular difficulty was no problem with 8+12 year old kids. It's a relatively short game, but it has a nice atmosphere and was a lot of fun to play.

Hidden in Plain Sight

A really fun party game and also very cheap. Graphics don't look great obviously, but it's a lot of fun with multiple different game mods to choose from.

• Out of Order
• Pile Up! Box by Box I played this with my dad who isn't super great at games, he really loved it!
• Ultimate Chicken Horse

Haven't played (from my wishlist):
• Mosa Lina
• Bokura
• Portal 2 (You mentioned this but for anyone else reading the sale is really good!)
• Tricky Towers
• Super Cane Magic ZERO - Legend of the Cane Cane
• WHAT THE GOLF?
• Surmount: A Mountain Climbing Adventure

Broforce would be my personal suggestion. Very easy to get into, good amount of characters makes for some nice variety, difficulty curve not too steep. Played it for hours back when it came out and still play it with friends every now and then. Check it out if you haven't already, it's 80% off on the couch co-op sale atm.

https://store.steampowered.com/app/274190/Broforce/

Maybe try some of the pinball games - https://store.steampowered.com/app/2328760/Pinball_FX/ - a lot of the tables are on discount right now

This is the one I have tried and would say is worth a shot - https://store.steampowered.com/app/442120/Pinball_FX3/ and again the tables are on sale

https://gg.deals/deal/steam-couch-co-op-fest-is-live-grab-multiplayer-hits-at-discounted-prices/

Im playing
big helmet heroes and is a lot of fun, the only downside is that you MUST have two controllers or you wont be able to play.
The other one I want to try is corriden

Chained together
https://store.steampowered.com/app/2567870/Chained_Together/

The Deadly Tower of Monsters is not on sale now but you can get it for less than 3 bucks every couple of months or so on resellers.
It's very fun to play in co-op and it's made to feel like an old scifi B movie, complete with a hilarious running commentary by the "director" which got me killed many times because I was laughing too hard to notice enemies coming my way.

On sale I'd recommend the Lego Star Wars Skywalker Saga. It's 80% off and you get a good 30 hours of gameplay. Lots of DLC but they are characters packs, from recent shows so you can just pick the Mandalorian up for 2 bucks if you really want to. I've seen this one for 8.50 on Fanatical this month though.
Beyond: Two Souls is also great in co-op and it's 75% off but I have seen it for less than 5 bucks elsewhere in recent months so it might be worth checking resellers instead.

Hah, I reached the end! Lots of fantastic suggestions here.

We're also playing Streets of Rogue, which has a bit of an old school Rogue feeling, but also a bit of a 'destroy everything' and gritty streets feeling from Streets of Rage. It's surprisingly thorough in letting you play different ways: blow everything up, bribe people, stealth, etc. Allows 1-4p co-op.

When my son was 10 years old, his mother went missing. I was deeply affected as well, both financially and mentally, but I played local co-op games with him to keep him entertained. The titles we played at that time were:

https://store.steampowered.com/app/431240/Golf_With_Your_Friends/
https://store.steampowered.com/app/1271700/HOT_WHEELS_UNLEASHED/
https://store.steampowered.com/app/204360/Castle_Crashers/
https://store.steampowered.com/app/996770/Moving_Out/
https://store.steampowered.com/app/905340/Heave_Ho/
https://store.steampowered.com/app/2368470/An_Arcade_Full_of_Cats/
https://store.steampowered.com/app/525510/Guns_Gore_and_Cannoli_2/
https://store.steampowered.com/app/1016920/Unrailed/
https://store.steampowered.com/app/641990/The_Escapists_2/
https://store.steampowered.com/app/1794680/Vampire_Survivors/