What are some PC games not available on Steam that people should play?

Real Life 2015

Dead Space 3 full version
Mass Effect 3 full version
Crysis 3
The Movies+expansion
C&C:Generals + expansion
LOTR:Battle for middle earth 1 and 2 with expansions
Black & White games
Rise of Nations: Rise of Legends
Empire Earth (1&2, 3 never happened )
Mafia games (removed recently because of bullshit licence
Dwarf Fortress
The saboteur
Warcraft games
Neverhood
Dungeon Keeper games
WOT(used to play a lot but retired few years ago)
The prequels of many of Steam games
And some other old games and series that i can't remember at the moment, that are famous but for some reason they are not on steam.

Region locked in my region :(
CivCity: Rome
Dawn of discovery

Minecraft.

Good old strategy games:
Tzar: Burden of the Crown
Submarine Titans
Primitive Wars
Alien Nations, The Nations
Theme Hospital

The Neverhood (Point and click game. Armikrog is a spiritual successor to the game that has been released on steam).

I don't think the game has ever been digitally distributed.

+1 Planescape: Torment
+1 Neverwinter Nights
+1 Dungeon Keeper 1 and 2

• Tanarus - (Such an awesome freaking game. Though, it's been dead for a long time now =( )
• Infantry (Another great game killed off =( )
• Urban Assault
• Battlezone (1998) - (play both the single player campaign, and multiplayer with friends)
• Monster Truck Madness 2 - (Seriously! Get a whole lot of friends together and play Summit Rumble through lan. It's king of the hill with monster trucks. It'll be one of the best times that you will ever have!)
• Soldier of Fortune - (with the full violence)
• Dwarf Fortress
• DoomRL
• Zootopia (haha)

NOLF and NOLF 2

yandere simulator

old need for speed games with achievements and multi

Rapelay, awesome gameplay also as some guy mentioned all blizzard games

Factorio (although it will come to Steam when it's finished).

Overwatch Beta

Armies of Exigo is quite nice, for those looking for a strategy game

Messiah under unreal 3 would be a pretty great game now a day, that game was pretty great back time