Download of Zombie Slayer 1.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app was originally produced by BHenderson. The most popular version of the program is 1.0. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software is categorized as Games.
From the developer:
Zombie Slayer is a Doom 3 mod that incorporates gameplay from games like Dragon's Lair and Shenmue. You are John McAllen, a mercenary hired for a research outpost on Mars. An alarm wakes you up one day. After you scramble for your gun and armor from your locker and leave your room, you find zombies everywhere.
You may want to check out more software for Mac, such as Jason vs Zombies, Yay! Zombies or Pro Zombie Soccer AE, which might be similar to Zombie Slayer.