Indie Dev Discovers His Forgotten Game Is Now a Proxy for Playing Undertale Online

Cold Pressed Games, the solo indie dev behind Crashphalt, recently discovered that their free-to-play Steam game from 2018 had quietly become a cult tool for Undertale fans — not because anyone was playing Crashphalt itself, but because it was being used as a workaround to enable online co-op in Undertale.

Crashphalt launched on Steam in October 2018 and picked up just 20 reviews over its first four years. Then, in January 2023, reviews started flooding in — 552 of them to date, almost all mentioning Undertale. The trigger was a YouTube video posted on December 2, 2022 by a user named AMMARO73, which detailed how to use Crashphalt as a proxy alongside the Undertale Together mod and Steam Remote Play to turn the mod's local co-op into online co-op. Undertale Together lets players experience Toby Fox's beloved 2015 RPG with a friend, but it only supports local play — so the workaround filled a real gap. The result: Crashphalt now sits at Overwhelmingly Positive on Steam, almost entirely on the strength of Undertale fans grateful for the trick.

Undertale is one of the most influential indie games ever made — Toby Fox's 2015 RPG built a massive, devoted community that has kept the game alive for over a decade through mods, fan projects, and creative workarounds exactly like this one. Crashphalt, by contrast, is a local multiplayer brawler that Cold Pressed Games described as not having "set the world on fire" at launch.

Cold Pressed Games posted about the discovery on the r/IndieDev subreddit and took the whole thing in stride. "I actually don't mind what Crashphalt has become," they wrote. "Undertale came out around the same time I was getting into game dev, and was incredibly inspiring to me. So I think it's really cool that it's found a way to impact the community even if in a small way." The dev has since moved on to other projects, and the unexpected spotlight might at least draw some curious players to check out what Crashphalt actually is — a game that, for the record, looks like a fun mix of TowerFall and Nidhogg.