Biological Warfare (Apocalypse)
Biological Warfare can be considered the ultimate human-designed weapon to fight the aliens. Either this or the Devastator Cannon can be considered your "standard issue" alien-slaying weapon in the mid-to-late game.
The Toxigun is one of the most powerful weapons in the game, available upon the completion of Biological Warfare research. Not only do the toxins specifically target alien biologies, but Toxigun shots can pass through Personal Disrupter Shields without destroying them. Note, however, that the toxins are relatively harmless to human adversaries.
"An X-COM weapon designed to shoot high powered projectiles containing anti-Alien toxic fluids. It is designed to cause minimal harm to other targets and is not very good at penetrating armor."
With the Toxigun comes Toxin A. While it is weak, it does have the ability to bypass (and thus capture) shields.
"Ammunition for Toxigun. It contains a lethal fast acting poison designed to target Alien life forms. It is not so effective against the more advanced bipedal Alien types."
Toxin B is a step up from Toxin A, but still not as potent as Toxin C. Takes 1-2 shots to kill Skeletoids or Anthropods.
"Ammunition for Toxigun. It contains a lethal fast acting poison designed to target Alien lifeforms. It effectively renders the earlier A-type toxin obsolete because it is more powerful and more effective against the higher Alien life forms."
Toxin C. This is the pinnacle of anti-alien warfare. A couple of shots will render even the hardiest Megaspawn dead at your feet. A great weapon, to be sure, but still lacks the ability to recharge. I use Devastator Cannons more often than this, but it is a good weapon nonetheless. NEVER use this weapon if you cannot mass-manufacture Toxin C. Otherwise your troops will end up without ammunition, which tends to put a damper on your success in battles.
"Ammunition for Toxigun. A fast acting poison which targets all Alien life forms with equally devastating effects. This toxin effectively supersedes the A or B types."
Comparison with the Devastator Cannon
Advantages for the Toxigun:
- High rate of fire. A four-man squad dual-wielding these can unleash a fog of bullets.
- Note: When paired in real-time combat and firing on full-auto, the rate of fire is so great that the secondary weapon barely gets used. An agent that does not have maxed firing accuracy should consider switching to a slower but more accurate firing mode. You will still enjoy the rapid rate of fire, but with much improved accuracy. This is less important for agents with maxed accuracy where firing accuracy is the same across the different firing modes.
- Small and one-handed. There is no loss in accuracy when dual-wielded
- Ignores enemy shields (without damaging them! You'll never need to manufacture shields.)
- Hurts humans less than a machine gun... will pratically never penetrate Disruptor Armor.
- Hurts humans almost as much as a machine gun... you can bring this on raids against COS, and get as many free Personal Shields as you want! Note that toxin-A does around the same damage as Toxin-B against humans.
Disadvantages compared to the Devastator Cannon:
- Requires ammo; costs money to fire, and bring plenty of extra clips for long missions.
- Fortunately, you can manufacture the ammunition. No more worrying about Marsec or MegaPol running out!
- Unfortunately, you must manufacture the ammunition. One small workshop working full-time should produce more ammo than you use once you've built up your stocks.
- Less accurate