可以和朋友在线一起玩的Difficult · Investigation游戏共 4 款，包括Fear Therapy、USAC: Code Breach和Project Unknown。
全部游戏: 4
Fear Therapy, is a multiplayer(1-4) and single player psychological horror game.Try to complete the quests and leave the horror house before it is too late! Satan getting angrier every second and nothing holding it back.
USAC: Code Breach™ is a unique coop experience set in a cyberpunk universe. As a special police unit, you and your partner are called in to investigate the unexpected shutdown of a high-tech research facility. Between reflection and action, you must survive a situation that is beyond you.
An online co-op horror game featuring unique playable characters and RPG mechanics. Exorcise ghosts using your special abilities and tools while surviving the supernatural onslaught
Dustland is a reimagined take on the survival genre. A world where expeditions, looting, and battles are just the tip of the iceberg, hiding secrets and mysteries of a fallen region in its depths.