If it's a long time ago there's a good chance I've been way too busy to update the site and Dodgeroll have patched a few things and suddenly Medal of Valor is B quality instead of C - sorry about that. The above date is there to give you an idea of how accurate the site currently is. The cheat sheet currently has all guns and items from the game including all three free DLCs - Supply Drop, Advanced Gungeons and Draguns and A Farewell to Arms. The search bar in the top right can also help you filter down the list to relevant guns and items. Hovering over or click one of the gun icons will display a description explaining what it does. This is a quick reference cheat sheet for all of the guns, items and shrines in Enter The Gungeon by Dodgeroll Games.
* Gungeon God - Enter the Gungeon Cheat Sheet
In-game, you can open the Mod the Gungeon console by pressing the key on your keyboard.