July 22, 2026
Locked crosshairs, unlocked opinions
Show HN: A new kind of FPS aim trainer
This aim trainer wants two minutes of setup, and players are already arguing nostalgia, trackballs, and browser fail
TLDR: OpenAim is a new practice tool that customizes aim drills after a short setup based on how your mouse behaves. Commenters split between hype, old-school bragging about classic shooters, curiosity about odd setups like trackballs, and complaints that the setup feels confusing or flat-out breaks in Firefox.
A new indie aim trainer called OpenAim has landed with a very serious pitch: give it a quick two-minute calibration, let it measure how you move your mouse, and it will build practice drills around your personal aim. The creator also points curious players to a deeper write-up, but the real fireworks are in the replies, where the community instantly turned this into a mini culture war over what "real" aim practice even is.
The loudest energy? Old-school swagger. One commenter basically waved away the whole thing with the now-iconic flex that "CS 1.6 scouts and knives was the ultimate aim trainer"—a classic gamer move that says no app can beat getting destroyed in ancient online matches until you magically improve. That nostalgic chest-thumping got matched by practical questions from players with unusual setups, including one person hoping this could finally help them become deadly with a trackball without rearranging their whole desk. Suddenly, what started as a simple tool demo became a referendum on whether aim skill is universal, hardware-specific, or just gamer superstition.
And then came the petty-but-relatable chaos: one user said Firefox leaves the crosshair frozen in the middle, which is about the worst possible bug for an aim trainer, while another warned the setup feels overwhelming for newcomers before they even get to the fun part. So the verdict from the crowd is deliciously mixed: cool idea, smart concept, but please make it easier—and maybe make it move.
Key Points
- •OpenAim is an FPS aim trainer.
- •The trainer builds drills from a measured model of the user’s aim.
- •The model requires two physical constants for calibration.
- •Those constants are the mouse’s counts per inch and the game’s conversion from counts to degrees.
- •The article says setup takes about two minutes and the data stays on the local machine.