Many of these I bought on sale so I didn't pay full price on both stores. These are some of my favorite all time games so I wanted to have DRM copies and to support the remasters. I'm a pretty big fan of Beamdog and appreciate the work they've done on my D&D games especially NWN.What games have you bought multiple times?
No Man's Sky on both Steam and Windows 10.
Several SSI Gold Box games and the complete collection on GoG along with some original disk titles.
NWN, Baldur's Gate 1 and 2 (and the enhanced editions), Icewind Dale (and enhanced), IWD 2 - Original disk version (only some of those titles not all), and then all both on Steam and GoG.
Betrayal at Krondor - original disk, GoG, and Steam
A couple of the Broken Sword games on GoG and Steam
Dragon's Dogma Dark Arisen - GoG, Steam
Dusk - GoG because the Steam copy I had was a review key and I wanted to support them. I guess it doesn't count quite as a double purchase.
Grim Dawn - GoG, Steam
Planescape Torment (and enhanced) - Steam, GoG
Turok 2 - GoG, Steam
Victor Vran - Steam, GoG
Skyrim - Steam, Playstation 4
There are a few more, but those are the main games. I don't do that as much anymore and mostly just buy on Steam now. I also don't play on my consoles much anymore either.