Arcade

Eat the network packets before they time out. Each packet consumed increases your length and score. Don’t run into the walls or yourself.

Malicious hex payloads are raining down. Type them exactly to neutralise each one before it reaches the kernel. You have 3 lives.

Your packet has to punch through five layers of firewall rules. Deflect it with the paddle; drop it three times and the connection is dead.

Waves of malware processes are descending on your open ports. Shoot them down before they reach the perimeter, and dodge their payloads.

14 logic bombs are hidden in the memory grid. Clear every safe address; the numbers tell you how many bombs sit in adjacent cells. Flag what you can’t touch.

The heap is leaking addresses in a pattern. Watch the sequence, then repeat it exactly. One wrong read and it’s a segfault. How deep can you go?

The real thing: id Software’s 1993 shareware episode, running in your browser via js-dos. The 5.3 MB game file downloads only when you press Boot.