Are there any good multiplayer casual games on Steam?

I don't know any of them, but maybe this helps.

adventures of shaggy and trine?

I think Puzzle Quest has multiplayer, but it's competitive .

Hero Academy

Trine 2. Casual, yet really fun to play. I'm almost sure that both of you will love it.

Puzzle Quest is certainly closer to what she wants, she specifically wants puzzle games. Trine 2 we actually already own and as much fun as I have with it, she only really plays casual puzzle games so I don't get to play it with her very often.

Critter Crunch

I wish! I've been looking for a co-op casual puzzle game for ages myself.

I think you will love Peggle so sad it dont have multiplayer in PC version...

Counterstrike (wink wink)

filtered search for ya

Awesomenauts is a really fun game. Not sure if that is something you two would be interested in though.

Maybe Dungeon Defenders or Terraria

Garry's Mod

All I have to say

Is League of Legends on Steam? Oh wait, that's only casual, not good.

Portal 2 has a pretty fun multiplayer.

I tried the filtered search Incog, 95% of the games aren't puzzle games and there seems to be no way to filter that for Steam. We do have Terraria already but she lost interest pretty quickly, she really only has an interest in casual puzzles. Tetris, Bejeweled, stuff alone those lines. She does like Portal though, that's certainly an option, I forgot that a sequel was even released.

As for League of Legends...I would never subject her to the cesspool of that gaming community.

rotastic

Does anybody own Magical Drop V? It seems like the only option on Steam right now...which is actually kind of sad. Anybody know if it's any good? Fiance says it's not a puzzle game she's tried before, but I don't want to dump the money for two copies unless it's at least a decent game, and the Steam forum has absolutely nothing useful at all for reviews.

Realm of The Mad God (free to play) as well. Pretty fun casual game.

There are some splitscreen casual games in the SEGA Genesis & Megadrive Classics. E.g. Columns, though many girls surprisingly like games like Streets of Rage and Golden Axe :-). Yes, really ;-).

My GF and I also enjoy some point&click adventure game from time to time - we sit at 1 computer and work through the puzzles and plot together.

Portal 2 is always a good bet, if you haven't already picked that up.

I've heard good things about Awesomenauts and Hero Academy, but I don't think they fit the category of puzzle games. Dungeon Defenders is another fun co-op game, but it's also not really puzzle-y.

Perhaps Frozen Synapse even?

There's also a great free-to-play game that got added to Steam this past year called Puzzle Pirates which I highly recommend. It's tons of fun and entirely playable for free if you don't mind having to spend a lot of in-game currency on Doubloons. The only drawback is it tends to suck up all of your free time. XD

awesomenauts its an awesome game but its not casual it take some skill but you can play it as casual if you want to

casual is drop in drop out, so I dont think casual is the best kind of game to have multiplayer!

One of the Worms games. Easy to get into, hard to master, and darn fun!