Just some graphical concepts though, I got this idea today.

((The Magusson device is number 2, it's used to kill striders in Half-Life 2: Episode 2. Though it could kill dropships and robots in Cortex Command))

First one probably possible. See spitfire flamethrower.

Second one can't be programmed to kill only machines, sorry =/

Third one is impossible, as the chainsaw would face only on direction.
If you shot that gun while facing to the right, it would look ok, but the sprite does not rotate. So if you shot it while looking to the left, the chainsaw would still point to the right, the same with all other directions.

Ffff,

Someone make number one

Actually (I'm not a fan of people that are all "ooh! make this mod plzktnxbai"), an incendiary grenade would be cool. And if it could be fired from a launcher, that would be even cooler. But Lord knows I'm a piss-poor modder...

I would have made this if I knew how to mod. :/

I know!
How about you learn?

Click "Back" on your browser, and read that topic called "Ultimate Modding Tutorial".
Then you'll know what can and can't be done, and also how to do it yourself!

Nah the tutorial didn't help me.

Then you're doing it ♥♥♥♥ wrong.

Try reading it.

Honestly it helps.

I read it , but it explained what each thing DOES, not how you actually mod it.

You change the number next to it?

Haleluja, how exactly do you change numbers from a pistol to make it a FireNadeLaunchin' Bazooka?

uhm, by not being retarded and read the modding tutorial?

You guys are really user friendly..
as user friendly as that tutorial..

And if you'd read the above posts, you would have seen that I already have read the tutorial.

Thread is obviously full of fail.

Read the tutorial because it details entirely how tomake that pistol into a grenade launcher. You're a liar and have not read it. Lock.