do i really need steam for portal 2(pc)

[deathb]

it always says that failed to load launcher DLLnull) do i really need steam to open this program or its non steam? plz help me find out i like this game and i hate to know that i cant play it

[Fullorton]

I am not a game addict, so dont know much about Steam and all. But I think yes... you need steam account for playing Portal 2. I can say this because of this:

Just open your Portal 2 game folder, then go to steam folder which is located in your hard drive. After entering into the steam folder, find the BIN subfolder and delete that folder as well. Then launch steam folder in that location, and finally run your game, the game will run properly.

Thats the solution to fix the said error. For more info, Checkout this:
Portal 2 error Failed to load the Launcher DLL: (null) when trying to launch

[deathb]

thnk you verry much i really apreciate youre help ill try and i had steam once ago but ideleted it dunno why