Watch the trailers?

[Acturas]

Do I need to watch the whole length of the trailers?
Do I need to use the steam player, or can I use another program?

Thanks

[lmdemasi]

I watched them in the steam player and you only get the objective if you watch them all the way through. The links to the games in the objective disappear once you've watched one for that game.

[Acturas]

Thanks, have some rep

[GC13]

I can confirm that having Steam launch them in the non-Steam player will not do the trick—Steam has to be your video player.