Pew Pew! a one-shot specialist. It's not about pathos over a campaign arc, and it's about a light-hearted space adventure with ray gunfights.
Or perhaps Josie and the Pussycats in Space (which is an actual show from 1972, 2 years before D&D was published) isn't such an attractive RPG.
Routinely Itemised is a weekly RPG news round-up and this week Kickstarter's Zine Quest is a vast shape on the radar.
Pew Pew! Bounty Hunters in Space is a quick, fun game designed for one-shots. It's rules-light, characters come pre-made, and there will be plenty of explosions.
As a thank you to Geek Native's Patrons, or anyone who becomes one before Monday the 25th, there will be a digital copy of Pew! Pew! Bounty Hunters in Space coming your way.
Fainting Goat Games have a one-shot campaign that uses (slightly modified) Havoc Brigade rules on Kickstarter called Pew Pew. It's about bounty hunters in space.