go to https://steamdb.info/app/1589380/ and click on install.
Hire a board, get to the chopper and hit the slopes in this endlessly replayable snowboarding score attack arcade game.
Going directly to the store page, it won't show up as free. Once you get it in your library, it stays there.
store page: https://store.steampowered.com/app/1589380/Horatio_Goes_Snowboarding/