Overtaken Online Books 1-4: A Dark LitRPG / LitFPS SciFi-Shooter Box Set

[ Overtaken Online. The world's first FPS VR-MMORPG with 100% immersion. Reminiscent of classics like Doom and Dead Space, but with RPG-elements that enable players to level up and develop skills – and sprinkled with a pinch of magic. ]
The 33-year old game designer Dex Walsh spends an entire year devoured by sorrow after the death of his wife. As a last-ditch effort to regain his joy, he sells everything and joins Overtaken Online.
Expecting to spawn in a noob-friendly area with guidance from his personal assistant, he instead finds himself naked and alone in a dark prison cell rapidly filling with gas.
Under-leveled and not knowing how to escape, he has no idea how far he will be able to progress as long as he pushes forward and doesn't give up.