HoloDust on 05 June 2017
Well, I can tell you what my 10 year old was obsessed with - Roblox Nerf FPS - it's basically your run-of-the-mill online FPS, but since kids love Nerfs, it's...well, kid friendly, if shooting other kids with Nerfs can be considered friendly.
Also, Portal 1/2, though they are not really FPS, but he loves them.
