Any games that are playable while downloading on Steam?

Some MMO's on Steam have that like RIFT and Wakfu

With Source engine (HL2, etc.) games this used to be possible.
I don't think that's possible anymore since removal of GFC files with SteamPipe update.

I remember a long time ago that a particular F2P super hero MMO on PS3 had this feature. You can play each parts every 20% of the download.
Would be nice to have this feature. Wanted to play vanilla Sanctum 2 but Steam won't let me play until I download a forced (3gb?)winter update.

Rift MMO, but the game isn't really good...

That's such a weird feature, does the game stop you from accessing stuff that isn't downloaded yet? It makes sense on a linear title like Source games because it can prioritize chapters in sequence but I imagine FIFA doesn't follow that formula.

Tera was like that.