Stardew Valley! At least on PC it has local split-screen co-op

Building/designing and open world - Terraria is well worth the money. Couch (split screen) co-op, and people can do their own things and team up to take down the bosses.

Broforce. Stick Fight. Party Golf. Worms WMD.

Plants Vs Zombies Garden Warfare (local 2 player split screen). I think all 3 of them.

My kids like:

Astro Bot (& Astro's Playroom)

Crash Bandicoot

Sackboy

Spyro

Ratchet and Clank Rift Apart

Overcooked

Lego Star Wars

Lego Marvel Super Heroes

Lego Hobbit

Lego Masters of Spinjitzu

Moving Out and Overcooked (1 and 2) will with teach them to be be the most co-operative siblings in the world... Or have you rushing to the ER.

I mostly kid about the last part. There will be frustrations but if your kiddos manage their emotions okay then these will be great games for them.

Astro's playroom comes with it, but there's also a full game.

The plucky squire is a really cool concept of a game that I enjoyed as an adult, but is written and presented like a story book (you literally jump out of the book and manipulate pages for some stuff), and it's definitely appropriate for kids both in terms of complexity and the writing.

Minecraft Dungeons is great for 3 player coop, and so is Teen-age Mutant Ninja Turtles: Shredders Revenge. My kids and I have played a ton of those two in particular.

While this isn't a specific game recommendation, I highly recommend getting a dekudeals account and adding the games you are interested in to your wishlist.

You will get alerts when the games go on sale. It has saved us a bunch of money with PS5 games.

A couple that come to mind:

• Crash Team Racing (basically Playstation Mario kart)
• It Takes Two (Fun co-op game, although maybe targeted towards older players based on themes)
• Boderlands (all support two players)
• Rayman games (should play up to four, basically Ubisofts Mariolike)

Also a great website for these things https://www.co-optimus.com/

As a gamer dad, there are sadly very few couch coop games that make the third controller worth it. It's good for them each to have one, though, so they can each be responsible for keeping it charged.

Sports games, whichever sports they play. Spider-Man was a big hit, if they can manage to take turns. I've heard good things about It Takes Two, but I haven't bought that one yet.

They just added phogg on ps plus its a fun co-op game where you control a 2 headed dog.