These days I like the sub-LAN, a.k.a. calling 1→3 friends to enjoy Steam couch party games supporting 2→4 xbox controllers. Here's my selection, sorted from most to least approachable to non-gamers and marking with * my personal long-time gamer favorites:

* Gang Beasts, http://store.steampowered.com/app/285900/

* Nidhogg, http://store.steampowered.com/app/94400/

* Hidden in Plain Sight, http://store.steampowered.com/app/303590/

* Mario Kart Wii, non-Steam, played on www.dolphin-emu.org

- Sportsfriends, http://store.steampowered.com/app/277850/

- B.U.T.T.O.N., http://store.steampowered.com/app/92400/

- Keep Talking and Nobody Explodes, http://store.steampowered.com/app/341800/

- Kalimba, http://store.steampowered.com/app/324140/

- Mount Your Friends, http://store.steampowered.com/app/296470/

- Starwhal, http://store.steampowered.com/app/263020/

* Lethal League, http://store.steampowered.com/app/261180/

* Clusterpuck 99, http://store.steampowered.com/app/337960/

- Broforce, http://store.steampowered.com/app/274190/

- Crawl, http://store.steampowered.com/app/293780/

* TowerFall Ascension, http://store.steampowered.com/app/251470/

- Monaco, http://store.steampowered.com/app/113020/

- Blur, http://store.steampowered.com/video/42640/5707

- Distance, http://store.steampowered.com/app/233610/

- Sonic & All-Stars Racing Transformed, http://store.steampowered.com/app/212480/

* A Fistful of Gun, http://store.steampowered.com/app/229810/

- Jamestown, http://store.steampowered.com/app/94200/

- Sky Force Anniversary, http://store.steampowered.com/app/355050/