Dylan, now a senior engineer at a different studio, reads the credits and smiles. He still has the original flash cart. He still plays it with Sandra every Christmas.
But the true magic? A small indie dev, inspired by the leaked footage, creates Parallel Plumbers , a 3D platformer built entirely for splitscreen co-op. It wins an IGF award. In the credits: “Special thanks to a lost N64 mode that proved two plumbers are better than one.” Super Mario 64 Splitscreen Multiplayer -Normal ...
But the real killer: memory. The N64’s 4 MB RAM (8 MB with Expansion Pak, which didn’t exist in 1995) couldn’t hold two full level instances. Their solution—instancing enemies and objects only near each player—led to bizarre bugs. In Big Boo’s Haunt , P1 would see a Boo, but P2 would see a floating book. The game’s state desynced so often that Sandra found a function called TRY_FIX_SYNC_LOOP() that literally spun forever. Dylan, now a senior engineer at a different
The screen flashes black. Then, the familiar castle courtyard renders—but split diagonally. Top-left: Mario. Bottom-right: Luigi. But the true magic
Dylan’s hands tremble. He nudges Control Stick 1. Mario runs right. He nudges Control Stick 2. Luigi jumps in place.
Fan servers host “co-op speedruns”—one player as Mario, one as Luigi, racing to 70 stars without desync. The world record for a full 120-star co-op run is 2 hours, 14 minutes—with 47 desync resets.