What to play?(EPIC game)

The Witcher 2 :)

Edit: UnEpic xD (Idk if it's good, just the name)

Edit 2: Black Flag was epic for me because of the beatiful nature. Far Cry 3 is awesome too.

Bad rats is quite epic.

Red Faction Guerilla, M&B series.

A Story About my Uncle - fantastic if you like platform-esque games. It is quite short, but gorgeous visuals and lovely narrative.

Outlast

God of War series if you have a playstation.

On steam maybe Enslaved: Odyssey to the West, or Castlevania Lords of Shadow series

Chivalry Medieval epic

All Half-Life series
Mount & Blade series.
My 2 favorite IPs

All Half-Life series
Mount & Blade series.
My 2 favorite IPs

Clive Barker's Jericho is a good game!!! :D

I'm surprised that you don't have Skyrim in your list. I'm playing it at the moment and it's not only epic in scope but a massively EPIC game.

So: The Elder Scrolls V: Skyrim

No portal and half-life?

Well, the list doesn't say if u have Borderlands 2 DLCs, but Tiny Tina's Assault on Dragon Keep is just BADASS.

If you are looking for a full game though, Portal 1 & 2 are great and not on your list ;) Also Skyrim!

Dragon's Dogma is pretty epic!

Also Elder scrolls series and fable the lost chapter ;)

If you have an console get red dead redemption stanley parable is quite awesome but for the epic part if you already have the witcher 1,2/DA:O/mass effect/shogun 2/far cry 3/AC series i don't have any good sugestions right now

Don't Starve

It's pretty epic if you get into survival games. Don't think I seen it on your list so figured I'd toss that out there. It's getting co-op/multiplayer in the form of Don't Starve Together sometime soonish from the sounds of it. Worth checking out.

Since you already have most of what I would recommend, I'd say try Binding of Isaac or maybe Garry's mod.

Dark Souls 2.

What about Star Ruler?
Or Supreme Commander (not 2 ! )?
StarForge is a great game for me!
Project Zomboid also on a very epic way :)
As already said above: Overlord :D

Bastion

Divinity: Original Sin, huge classic RPG for hours and it has quite nice graphics and maby try Bastion, cheap but fun as hell

Tomb Raider :)

The Walking Dead (season 1 and 2).....

or Saint Row saga ("The Third" is my favourite....)

If you're not restricting yourself to just PC, Halo.

Draw a Stickman: EPIC?
the epic part is already in the game name :D