Sweet Pen

or Dota 2, Dota 2 is hard as fuck

Hardest Valve game I'd say.

Nah, that goes to CSGO if you ask me, all about managing your situation corectly, keeping cash in line, and relying on team mates to back you up.

Dota is actually a bit easier for me. Guess it is just preference XD

naw man CSGO is really easy