HacX: Twitch n Kill for iPhone

HacX on iPhone — a reinvention of Doom II

HacX: Twitch n Kill is a complete action title released for iPhone that functions as a total conversion of Doom II. Although it did not succeed commercially, it earned a strong reputation within the modding community for taking familiar Doom II elements and reshaping them into a fresh, standalone experience.

Combat, tools, and map structure

The game blends rapid, arcade-style shooting with complex map layouts that reward exploration and quick reflexes. Players move through varied environments, face a range of enemy types, and can equip multiple weapons. The visual presentation and enemy encounters give the mod its own identity rather than simply mimicking the original Doom II look.

Cultural and creative influence

Beyond the home release, HacX became notable for inspiring designers and artists who contributed to the wider mod scene. It served as a stepping stone for several creators, demonstrating how a conversion project can highlight new aesthetics and level-design approaches while expanding what a mod can accomplish.

Titles to try if you liked HacX

• Brutal Doom — an intense, modernized overhaul that amps up gore and mechanics.
• Five Nights at Freddy's 2 (paid) — a very different horror-focused experience if you want a change of pace.
• GZDoom-based total conversions — community-driven projects that push the engine’s capabilities.
• Classic Doom II (vanilla) — for players who want the original source material in its straightforward form.