There are many weird crossover gaming events out there. Fortnite has one every week it seems. But taking the award for the oddest crossover of 2020 (so far) is Bridge Constructor: The Walking Dead.
Bridge Constructor: The Walking Dead Revealed, Coming In 2020

The game was announced during Opening Night Live with a live-action trailer. An odd trailer. Which meant we don’t have much gameplay to go o, but here’s what the Steam page describes:
“Join a group of survivors as they fight against hordes of undead walkers and a hostile human community. Build bridges and other constructions through bleak landscapes and ruined structures.
Team up with fan-favorite characters like Daryl, Michonne and Eugene, and create safe passage for iconic vehicles from the series.
Use movable level objects, explosives and baits to your advantage as you lure walkers into lethal traps and guide your survivors to safety.
Enjoy the physics-based frenzy and ragdoll animations as walkers succumb to the forces of gravity.”
Bridge Constructor: The Walking Dead is coming sometime in 2020 to PC.