Of course. The more the merrier. The only thing to be aware of is that it’s largely a good/neutral party, so if you’re playing evil you’ll have to do it well and be a little incognito.
DotE is a tower defense roguelike with pixel graphics and a team of heroes you manage. It also has one of the best soundtracks I’ve ever heard.
Castlevania needs no description. It’s just one of the best games ever made.
Neverwinter Nights has stood the test of time for me because it has persistent game worlds, built by other players (basically mini, homemade MMO’s), that you can log in and play. I also use its DM client to run online adventures for other players myself.
I hope they’ve made the second a little less of a chore, because it really is a cool setting, and I loved that I could partner up with other players’ toons.