ArenaNet, the developer behind Guild Wars 2, has released a 2D platformer called Rytlock's Critter Rampage, available to play for free in your browser.

The game's derived from an '80s-style commercial the company made as an April Fools' joke earlier this month. The commercial itself was for a 3D platformer called Super Adventure Box, which ArenaNet also created for real inside its popular MMO.

ArenaNet says Rytlock's Critter Rampage was going to be cobbled together from a few sprites for the sake of the joke, but cinematic artist Delly Sartika had wanted to build a retro platformer and did the whole thing in about three weeks.