Same. I rocked that game for a year before Pokemon Go came out. It was insanely addictive. I would walk like 3-5 miles a day and I'd take way too many breaks at work to go hit the portals by my office.
I participated in a few anomalies, both as support and an on ground person hitting the objectives. Shit was rad, man. I met a couple cool people and even business contacts through it.
I was trying to think of a PC game until I saw your comment. It's totally Ingress for me too. I was hooked and my area (Chicago burbs) had a very active player base. The ops and competition were intense! I really enjoyed the real-world tactical shit, closest I'll ever get to feeling like I was part of a military operation.
I still play it too, but not like before. It's a great way to kill time and explore new places. I think I'm level 12, almost 13, and I'm lazily working towards more badges. I don't understand what the red faction is all about and the other new stuff.