The Alien Forest Egg is the 161st egg in Pet Simulator 99. Hatching this egg costs 9 
500K 
.
Pets included in the Alien Forest Egg[]
- Gleebo The Alien (70%)Gleebo The Alien (70%)
- Nine Eyed Lion (20%)Nine Eyed Lion (20%)
- Alien Arachnid (9%)Alien Arachnid (9%)
- Alien Axolotl (1%)Alien Axolotl (1%)
- Alien Parasite (??)Alien Parasite (??)