Greetings lunchtime audience. Get ready to mainline some nostalgia. Not only is Wolfenstein 3D playable in a browser, coyly placed behind little but an age-gate, but the lovely people at the Zenimax/Bethesda/id conglomerate have unlocked all the levels.

Want to face Mecha-Hitler? Fancy going toe-to-toe with the doctor that chucks syringes? As the hippos that once advertised Hippopotamousse were once wont to say, ‘Come on. Dive in!’.

Replaying Wolfenstein 3D feels like visiting long dormant parts of your brain. I booted up the last level, for example, and instinctively knew which Nazi insignia would reveal a secret. It was almost uncanny – like I was reading a message left for me by my twelve-year-old self in a net of neurons. Very soon, however, I was following back into the habits of yesteryear – sliding along every wall jabbing at the space bar in the hope that more walls would budge…

Then of course there’s little more joyous in gaming than seeing the frame of animation when one of the brown-suited grunts buys the farm – turned to the side, blonde hair visible, helmet flying off and with a blood spatter at the mouth…

Go on, take Wolfy for a spin for five minutes. You know you want to…