Spring RTS Engine

I'd like to know of some kind of free 3D engine (or C# SDK) (probably an FPS) that would be suitable for making a homebrew Multi-Player Real-Time Action Roleplaying game (in the style of Torchlight, WoW, Champions Online etc) it should also have some semblance of platforming (a bit like Ratchet&Clank)... namely, in the long run, I would like to make a free open source massively multi-player game... though for now I would just be mucking about... stealing content from other FOSS projects etc.

I could probably use some help I suppose too... but right now I'm looking for engine/SDK suggestions.

ogre.

Spring RTS, i heard everything is possible in this thing called lua.

Unreal Engine 3 ftw...

Well for some Open Source engines go here and look at the "Most Reviewed Open Source Engines" box at the right to get an idea:
http://www.devmaster.net/engines/

You also might want to have a look at Unity although you'd have to pay to get the full featureset (maybe the Indie version features are sufficent for you though)...

SO far Ogre is in the lead... though I like the idea of blender and a few others... Ogre has the best documentation so far

Free as in free-beer, or free as in OSS?

Because remember there is also the Torque engine and the Unity engine for free-as-in-free-beer.

And there's Sauerbraten which is a behind-view/first-person shooter engine, but it actively has an RPG in development.

There's also Irrlicht, which is more minimalist than others - it's supposed to be a good way to get 3D graphics going if you're planning on writing the game in C++. It's not a full engine, but a very polished 3D graphics library.

And there's Crystal Space, which is one of those ultra-ambitious OSS projects that is massively huge and supposedly the all-singing, all-dancing 3D engine... but I've never seen anybody do anything cool with it.

And there's Blender, which has an engine in it. Apparently it is as featureful and user-friendly as the rest of Blender - which meas you can do anything in it, but you'll never figure out how.

Oh, and Panda3D is supposed to be good, too.

And there's Crystal Space, which is one of those ultra-ambitious OSS projects that is massively huge and supposedly the all-singing, all-dancing 3D engine... but I've never seen anybody do anything cool with it.

I agree with that sentiment, unlike OGRE it never seemed to get the focus right, and always seems like it's an experiment.

Personally, I've been pretty impressed with OGRE's current incarnation and Unity, although I think it'd be easier to get deep support for OGRE unless you're a paying customer for Unity (which is not terribly expensive, as engines go). If I was going to work on a new engine atm it'd probably be down to testing those two.

There is a pretty neat MMO that uses crystal space, but that engine is *impossible* to work with.

...So many dependencies, don't make me download more libs, please!

ALSO

http://www.moddb.com/engines