LogFAQs > #980329038

Played the hell out of river city girls 1 (this game does not have native online co-op, but you can use the playstation 5 and 4's built-in shareplay to play it online with your friend) and river city girls 2 (which does have native online) with my best friend and bro.

Actually, because of the playstation's shareplay ability you can consider any game that has a local co-op function to be able to be played online, like deathwish enforcers and contra operation galuga.

*If you never used shareplay before and want to learn how it works, I made a old post about it on the TMNT cowabunga collection's board*
https://gamefaqs.gamespot.com/boards/360793-teenage-mutant-ninja-turtles-the-cowabunga-collection/80135719

Using playstation share play, you can even boot up some disney afternoon collection just to play chip n' dale rescue rangers NES online, lol. Stuff like tales of symphonia and tales of vesperia definitive edition, the collection with zombies ate my neighors+ghoul patrol, games like this benefits from share play.

If either of you are a fan of dynasty warriors, then dynasty warriors 8 xtreme legends can actually be played online with the PS4 version on free mode. (Alongside one piece pirate warriors 3 and 4).

Dragon's crown pro is a good one.

There is this old indie game called mercenary kings that I thought was cool to hop on co-op with my brother every now and then. (Can get hard as hell though).

Mythforce is alright. (80's cartoon art style inspired first person action game rogue like).

Capcom beat'em up bundle.

Saint's row. (Now hear me out......the glitches can be hilarious on co-op, and I believe all of the game-breaking bugs have been patched out at this time. Enjoy the cheesy story together).

Diablo 3 is always a good time.

Back 4 blood is alright if you happened to forget this game is a thing that exists.

Monster hunter world and monster hunter rise both gives a ton of good co-op hours.

If you want a tower defense game to play on co-op then orcs must die 3 is cool.