Final Fantasy X (useful against bosses for the first time, like... ever) Kingdom Hearts: Birth by Sleep (aoe and fast-acting) League of Legends or other MOBAs The latest Pokemon games have had good poison moves Dragon's Dogma... the poison cloud does "dark" damage so even if the effect itself doesn't apply, you still do a lot of damage and due to the way the hit detection works you "slow" enemies as you're stunning them slightly about 20 times per second --- The man keeps us down because he likes to see us frown
Currently in Warframe, all poison ignores armor, which makes it very good, but there isn't many poison weapons.
You can acquire the Torid, which is a poison grenade launcher. You can apply several mods, including ice damage to the poison clouds, to slow them down and make sure they stay in the cloud longer. The Acrid is also a very powerful dart gun, and currently one of the best weapons period between fire rate and DoT.
Did I also mention DoT from those guns stacks? Because it does. Torid is one of the best weapons for defense missions because of being able to just fire a whole clip of poison clouds in an area and having something even high level enemies will feel the effect of. Get Vauban with his Vortex ultimate and you have something that locks them in place and will deal even MORE DoT on top of the Torid clouds.
Such a shame the poison frame, Saryn, is underpowered these days in comparison to some of the newer frames. --- A duck walks into a doctor's office and says, "Quack!"