All Free champions

So at the moment i know that we can get 5 free champions:

• Alistar with skin Unchained (Subscribe LoL on Youtube)

• Tristana with skin Riot Girl (Like LoL on Facebook)

• Garen with skin DreadKnight (follow LoL on Twitter)

• Warwick with skin Grey (Refer 3 friends (they much reach lvl10))

• Twitch with skin Medieval (Refer 5 friends (they musch reach lvl10))

Question

Are these the only champions/skins you can have for free?

Solution 1:

Those are the only skins (and champions) you can get for free at any time. There are however some skins that are gifted at certain events. Right now there is a community event that rewards every player with a Pool Party Mundo skins if the community reaches 55 Million points through winning matches and gifting skins.

Other than that Riot skins exist that are often given away for free at major events where Riot is participating (Gamescom, Pax, etc.).

For ranked players above gold there has been a Victorious skin every season so far and it's almost certain that this season it will be the same but the champion hasn't been confirmed yet.