Including:
.50Cal
AR1 Editable
Minigun

.50Cal uses AR2 ammo and Minigun uses SMG ammo.
Stand behind one and press E on it to use it, continous shooting will cause overheat.
Ar1 has editable firing styles and AI, also with infinite ammo.

Including:
Ammo Drum
Cannon
Cannon(Infinite)

Hold Shift and E on the cannon to adjust the its angle.
There are 6 ammo types, hold C and right click the ammo drum or infinite cannon to switch it.
For non-infinite cannon, pick up a cannonball from the ammo drum and place it on the cannon.
After reloading, press E on the cannon and wait for the fuse to run out.
You can also launch yourself with the cannon by loading a passenger cannonball,
which launches the player who lit the fuse and is standing next to it.
Wooden parts of the cannon can be removed.

A flash game that have been played on the internet before.
Rules are already written in it so here's the long and short of it.
If there's a 9, choose 9. If not, choose the wrong option. It may sound absurd, but that's the game.
Choose the option by standing on the cubes on the ground, not pressing E on the UI.
A lot of people do this during closed beta.

Press E on it to activate, fires a deadly current at its target after a brief period of recharging.
By default it only targets NPCs, which means you will have to edit it (hold C, right click, edit properties, once again).

Remake of my old addon NPC Attack Point. Edit before usage.
Will attract all the NPCs around map to track and destroy the point on activated.
If 'Strong Priority' is enabled, NPCs will ignore any enemies on their way to the point. Not recommended.
If 'Capturable' is enabled, it switches its team when the point's health drops to 0, instead of turning off.
If 'Silent' is enabled, it will no longer beeps on damage and no effect when destroyed.
However, beeping does attract some allies to protect the point, a little bit.

A clump of weeds you can hide in. Crouching in it will keep you out of the way of other players and NPCs.
But if you're touched, damaged, fired a bullet, moving too fast , you'll be exposed, and cannot hide for about 2 seconds.
Can be burnt down with explosions and fire.

Warm and cozy campfire, press E to edit its fire level, nothing much to say.

Self-charging energy shield that protects you from a portion of damage.
Editable, hold C, right click, edit properties, won't say it again.
Special shields only function until broken, after which you need to wait for it to fully recharge.

Remake of my old addon Erchius Ghost.
Picking up some crystals will cause a life-absorbing ghost to chase you down, and it won't give up until you're dead.
I remember playing various sandbox games over the years, like Terraria, Starbound, Minecraft, GMOD, etc. Some good and old memories I think.

Including:
Garden Toolbox
Garden Tray

Pick up some seeds, a watering can and some bags of fertilizer and grow things from a garden tray, easy.
Too little water or too much fertilizer can cause plants to fail to grow.
Seeds can be planted on the ground by pressing R+E, a little bit crappy however.
Crops are useless for now. Wait for future update.
Used to be part of the Fishing Mod.
No one knows that Fishing Mod used to have workbenches and storage boxes and more things before publication.

Remake of my old addon A Gas Can.
Pick it up by pressing E, and pour gasoline on anything you want, and ignite with explosions and such.
Can be straighten the can by pressing R+E, and ammo drum for the cannon as well.

Including:
Goat
Trigger
Vengeance Goat

Remake of my old addon...whatever, it was never released.
Goat does something. I won't say it now. Games lead to violence, prove me correct.
Trigger and Vegeance Goat can be adopted by pressing E. They will follow you around and take down your enemies.
Will fight back if you attack them, and won't trust you again until you're dead.
Enemies will be 'Marked' when shot by the companion, marked enemies will get 30% extra damage dealt by its owner.

Stolen inspiration detected :p
Press E or attack to open it, spawning all kinds of things.
Has 29 possibilities for now. If you have more ideas I can add them to it.

Take away the lid and watch passersby suffer.
Something you don't need to know.

Editable, you know.
If you want the real microphone voice to be affected, turn on 'Full DSP'.
Due to my limited coding skills, others can't hear your affected voice outside of its range.
So if you want to karaoke, you need to shut up everyone around you before you sing.

Vanilla 16x16 minesweeper game, press E to modify max mines on the board.
Game won't stop if you triggered a mine, very sandbox.
Had done a wire expression 2 version of it, but it was taken down because few people noticed it.

Will fly around you, firing bullets and rockets when you shoot with weapons.
Different to companions, you can take as much choopers as you like.
However, it explodes when destroyed, and I've never seen anyone survive that.

Those who know it know it, those who don't I don't recommend knowing it.
It's not really related to the original, it's just a stalking nextbot actually.
Will follow around any player, trying to get his back and stab from behind.
I don't like nextbot chase, but I don't object to people playing it.
Spawn 50 mogekoes, take out the best rifle or shotgun you have that deals more than 200 damage, shoot, run, enjoy.

Another flash game I've played.
Press E to pet the dog, and watch it spins.
R+E to reset the pets.

Ripped part of my Alchemy Mod which is now trashed.
I don't feel like sharing the story about it, but you can have this.
You can either throw it or drink it. R+E to cork/uncork the bottle.
Deals some chemical burn damage on break, but heals you when drunk.
Looks nice anyway.

Remake of my old addon Power Pills. But I end up deleting all the files so here is a rewrite.
Taking pills give you damage boost and damage resistance. Don't take too much, however.
The effect of the pills can be eliminated by diving into water.

Including:
Scenario
Scenario Bot
Scenario Spawner
Supply Spawner

General PVE combat simulator with nextbots.
Used to be Holdout Generator, I was going to post it separately, but there were just too many bugs, before.
You will need some custom weapons to play it, and equipments like Defibrilator is recommended.
May require a lot of testing for bugs and balancements.
Set up some scenario spawners around the map before playing, or you will see enemies teleporting right at you.

Has anyone played SWAT4? You can use remote snipers outside to support you when CQBing, tacticool mechanism.
Okay back to the topic. It's recommended to enter 'bind n xdess_open;bind m xdess_zoom' before using it.
Press E to sign up a sniper. Press N to check out the sniper's view, and then press M to control it.
Snipers will be uncontrollable when injured, and takes time to recover but cannot be killed.

Remake of my old addon. but not published by myself.
Test your weapon accuracy and damage with it. Press E on it to clear the stats.

Rotate the blocks by pressing E on them, and reset the game by pressing E on the post.
Nothing much to say, as well.

An addon as old as Some Handy SWEPs, but remain unpublished for years.
It used to have a lobby menu and a crappy level editor but I deleted them all at that time.
Recently I rewrote some parts of the code, remade the UI and added more levels and it's now here.
Requires two players to play this. The first player to win eight mini-games wins the game.
You can leave the game by pressing C.
Infinite ammo addons will have a big negative impact on the game.
Currently there are 35 levels, can add more if you have inspirations.