UFOs - Ovnis English translation/hack

UFOs is a hack/translation of the 1986 Portuguese mini-game shooter Ovnis, originally developed by Softfile and programmer Lino Oliveira for the ZX Spectrum.

In this one-screen arcade game, alien ships descend toward Earth one by one. Your laser cannon can't destroy them — only delay them. Once 11 ships land, the invasion is complete.

This English version improves the original by fixing bugs and reducing flickering, while retaining features like redefinable keyboard controls and staying faithful to the original game's design.

Tools used:

• ChatGPT and DeepSeek, for translation and code suggestions.
• HxD, hex editor, for text and code editing.
• Tapir, for BASIC code information.
• ZX-Blockeditor, for block expansion.
• Fuse, Es.pectrum and Speccy emulators.
• UpdateTapChecksums, for updating the checksum bytes.

Obsolete.gr is not affiliated with Softfile or Lino Oliveira, the original creators of the Portuguese game. Copyright for the game itself belongs to them.

Translation and hacking was done by Vag.