The UMP-45 | Mudder debuted in CS2 on September 3rd, 2018. It was launched with the Austin 2025 Inferno Souvenir Package during the "FACEIT 2018 – Ways to Watch" update.

The UMP-45 | Mudder skin is available by opening one of the 10 designated containers. These include the Antwerp 2022 Inferno Souvenir Package, Austin 2025 Inferno Souvenir Package, and Berlin 2019 Inferno Souvenir Package. Additionally, the skin is part of The 2018 Inferno Collection.

The UMP-45 | Mudder boasts an impressive 85% popularity, placing it in the top 15% of the most sought-after items in CS2. This ranking is determined by daily sales volume and the skin's price.

The UMP-45 | Mudder is among the 278 SMG skins available. As a Consumer Grade skin, the Mudder is fairly common in the game.

The UMP-45 | Mudder is an affordable skin, priced between $0.01 and $0.75. It is readily available and can be found across various markets.

The UMP-45 | Mudder has a float value between 0.06 and 0.80, making it available in all exteriors. Each exterior also features a Souvenir version of the Mudder skin.

The UMP-45 | Mudder features a unique "Hydrographic" style finish. It’s created by submerging disassembled weapon components in a water tank with a floating hydrographic film, resulting in a distinctive pattern. Primarily painted in shades of gray, the Mudder's appearance varies based on its pattern index. This skin utilizes the classic legacy model, making it a standout choice for collectors and players alike.