This mod works with the Farewell to Arms update

They will drop according to their rarity in the Gungeon automatically.

You can type kts in the console to get a list of item IDs
If you want to spawn an item in, use the command give kts:item_name

Items

Icon	Name	Type	Description	Synergies
	Adhesive Grenade		Adds a chance to attach a bomb to an enemy on hit.	-
	Baby Good Blob		Summons a companion that attacks enemies with randomized goop.	-
	Big Slime		Gives you 3 coolness	Cool Kids Club (Strafe Gun) - Continuously moving with Strafe Gun held gives the player a yellow glow, increasing movement speed.
	Blood Bank		Trades hearts for casings.	-
	Blood Shield		Trades hearts for armor.	-
	Boss Bullets		Increases damage dealt to bosses.	-
	Cloak and Dagger		Activate to enter stealth. Activate again to backstab a nearby enemy.	-
	Cursed Ring		While active, disables boss DPS cap.	-
	D-Chest		Re-rolls chests.	-
	Ice Pack		Actives cool down passively, +1 active slot.	-
	iLevel		All stats down. Kill enemies with your gun to gain XP. Spend XP to level your stats.	Wanna develop an app? (iBomb Companion App) - An explosion will occur near a random enemy in the room each time iBomb is used.
	Magic Mirror		Reflects all enemy bullets when used.	-
	Mask		Increases dodge roll distance and allows the player to phase through enemies while dodging.	-
	Material Emancipation Grill		Temporary invulnerability and increased dodge roll damage.	-
	Mimic Whistle		Two uses. Summons mimics, and increased coolness while held.	Mimicreed (Mimic Tooth Necklace) - The mimic whistle now summons three mimics instead of two
	Monster Ball		Summons an electric-type companion to fight for one room (or 60 seconds).	-
	Ring of Guon Swiftness		Guons spin faster.	-
	Ruby Lotus		Damage increases for each third of your max HP you lose	-
	Scroll of Approximate Knowledge		Vaguely describes chest contents.	-
	Slot Machine		Grants rewards or penalties randomly.	-
	Sweating Bullets		While active, damage is tripled, but health is reduced to 1 hit.	-
	Terrifying Mask		While active, applies fear to nearby enemies.	-
	Thermometer		Coolness increases damage.	-
	Toy Drone		Summons a remote control drone that can be detonated.	Apache Thunder (Air Strike) - Adds 4 more explosions on detonation The Fire and the Flames (Napalm Strike) - Drone now leaves napalm circle on detonation Remote Control (Remote Bullets, 3rd party controller) - Drone has 2x movement speed and damage

Installation

Get MTG:

• Download Mod the Gungeon at: http://modthegungeon.eu/#download
  
• Make sure Enter the Gungeon is closed
  
• Open ETGMod.Installer.exe and press "Step 3: Install ETGMod"
  
• Close dat thang
  

Installing mods:

• Go to your Enter the Gungeon Steam directory, usually located at:
  "C:\Program Files (x86)\Steam\steamapps\common\Enter the Gungeon\"
  
• If there is not one already, create a folder called "Mods"
  
• Drag CustomItems.zip into the Mods folder
  
• If there is a "mods.txt" file in the Mods folder, delete it
  
• The directory should look like this:  "Enter The Gungeon/Mods/Mod.zip
  

Then launch the game. If Mod the Gungeon installed correctly, you can press F1 to see the list of active mods. 

Open the console with ~ or / to enter commands.
Type help for a list of commands.

Source code: https://github.com/KyleTheScientist/KTSItemPack/tree/master/CustomItems