Sites like BlueStacks App Player or various cloud gaming services can sometimes run the mobile version of Terraria 1.4 directly in a browser window, which bypasses the need for a local installation.
The full 1.4+ experience is available on iOS and Android devices. Playing on your own phone completely bypasses school or work computer restrictions. Cloud Gaming:
Terraria is a paid product developed by Re-Logic. Accessing "unblocked" versions through unofficial mirrors often circumvents the developers' ability to be compensated for their decade of free updates. Conclusion
: Unblocked web versions often suffer from frame drops. Lower your in-game settings (turn off "Heat Distortion" and "Storm Effects") to improve performance.