Includes Source SDK 1 games

Multi-player 151 Single-player 138 Steam Achievements 137 Co-op 114 Online Co-op 106 PvP 94 Online PvP 93 Steam Trading Cards 86 Full controller support 84 In-App Purchases 58 Cross-Platform Multiplayer 52 Custom Volume Controls 52 Camera Comfort 42 Family Sharing 42 Steam Cloud 41 MMO 31 Adjustable Text Size 30 Playable without Timed Input 30 Steam Workshop 26 DualSense Controller Support 23 Stereo Sound 23 DualShock Controller Support 21 Color Alternatives 19 Partial Controller Support 19