Play Time Hollow (E)(EXiMiUS) Online

Time Hollow is a 2008 Nintendo DS game developed by Konami. It came out during a period when the DS was full of experimental titles that used the touch screen in clever ways, and this one fits right into that niche. You don't see many games like it, even now.

You play as Ethan Kairos, a teenager who receives a special pen on his birthday that lets him draw "hollows" on the DS screen to interact with or alter the past. The main goal is to find your missing parents by solving a series of interconnected mysteries. The gameplay is screen by screen exploration, talking to characters, and using the hollow pen to change past events, which then immediately alters the present environment and story. The pacing is deliberate, more about thinking through cause and effect than quick action, and the difficulty comes from figuring out exactly what to change and when. It feels like carefully pulling a single thread and watching the whole tapestry slowly come undone.