Stronghold HD (2012)
Steam: $5.99GOG: $1.79
Stronghold: Warlords
Steam: $39.99GOG: $12.49
Stunt Island
Steam: FreeGOG: Free
Submarine Titans
Steam: $4.99GOG: $0.99
Subwar 2050
Steam: $9.99GOG: $9.99
Sucker for Love: First Date
Steam: $9.99GOG: $9.99
Sunrider Academy
Steam: $9.99GOG: $1.99
Sunrider: Liberation Day - Captain's Edition
Steam: $24.99GOG: $4.99
Super Chopper
Steam: $9.99GOG: $3.49
Super Huey™ 1 & 2 Airdrop
Steam: $9.99GOG: $1.99
Super Huey™ III
Steam: $6.99GOG: $2.09
SuperPower 3
Steam: $29.99GOG: $9.99
Surgeon Simulator
Steam: $9.99GOG: $9.99
Surgeon Simulator 2
Steam: $19.99GOG: $9.99
Surviving Mars
Steam: FreeGOG: $9.89
Surviving the Aftermath
Steam: $29.99GOG: $8.99
Swag and Sorcery
Steam: $12.99GOG: $2.59
SWAT 3: Tactical Game of the Year Edition
Steam: $9.99GOG: $6.49
Switchball HD
Steam: $12.99GOG: $4.49
Sylphy and the Sleepless Island
Steam: $19.99GOG: $14.99
SYMMETRY
Steam: $11.99GOG: $11.99
Synergia
Steam: $11.99GOG: $4.19
Synergy
Steam: $24.99GOG: $9.99
Tachyon: The Fringe
Steam: $9.99GOG: $9.99