Just because I own these doesn't necessarily I played all of them, but I plan to eventually. The checked ones are games I have played before for at least a few hours.

• ✔ Audiosurf
• Garry's Mod
• ✔ Geometry Dash
• Hylics
• ✔ Hypnospace Outlaw
• ✔ Minecraft
• ✔ Placid Plastic Duck Simulator
• ✔ Plague Inc: Evolved
• Portal 1 and 2
• ✔ Scribblenauts Unlimited
• The Stanley Parable: Ultra Deluxe