I bought this bundle and was wondering what my payment ratios were.

Game                                Price 1  Price 1  

Age of Wonders III                             7.50     Own
All You Can Eat                                0.50     Windows
Armello                                        8.00     Own
Baba Is You                         12.00             
Ball, The                                      2.50     Windows
BioShock Remastered                            5.00     Own
Broken Age                                     7.50     Own
Company of Heroes 2                            5.00     Own
Crowntakers                                    3.00     Own
Darkest Dungeon Shieldbreaker DLC              2.00     Don't Own Main
EarthNight                          10.00             
Eastside Hockey Manager                        5.00     Windows
Elite Dangerous                                7.50     Windows
Endless Space - Collection                    10.00    Own
Football Manager 2020               25.00             
FRAMED Collection                    4.00              
FTL                                            2.50     Own
Gonner                               2.00              
Gunscape                             0.00              
Hyper Light Drifter                  8.00              
In Between                           3.00              
Jackbox Party Pack 4                15.00             
Kerbal Space Program                10.00                             
Kingdom Classic                                0.50     Own
Knights of Pen and Paper 2           2.00              
MirrorMoon EP                        1.50              
My Memory of Us                                4.50     Windows
NBA 2K20                                       9.00     Windows
Neo Cab                              9.00              
New Beginning - Final Cut, A         1.00              
Newt One                             3.50              
No Time to Explain Remastered        5.00              
>observer_                           7.50              
Overgrowth                           9.90              
Overlord II                          2.50              
Pesterquest                          8.00              
Planet of the Eyes                   2.00              
Plunge                               5.00              
Realpolitiks                         5.00              
Regular Human Basketball             1.00              
Sonic & SEGA All Stars Racing                  2.50     Windows
Spelunky                                       2.25     Own/Win
StarCrossed                          8.00              
Super Time Force Ultra                         3.00     Own
Surviving Mars                      10.20             
System Shock 2                                 2.50     Own
System Shock: Enhanced Edition                 2.50     Windows
This War of Mine                               5.00     Own
Titan Quest Anniversary Edition                5.00     Windows
Vertiginous Golf                     2.00              

Total                              172.10    102.75    

So $174.10 of games I don't have and can play on Mac (though not necessarily on Catalina, many semi-old games are still 32-bit) at current Steam Summer Sale prices. Donated $30 so that's an 83% savings. Hopefully I'll play some of these games otherwise any savings is moot.

Also kind of surprising how much I already owned. I definitely buy too many games.