Probe Software (later Probe Entertainment, and ultimately Acclaim Cheltenham) was a British videogame developer founded in 1984 and acquired by Acclaim Entertainment in 1995. In 2001, Probe Entertainment became Acclaim Studios London. It was responsible for developing Mortal Kombat and Mortal Kombat II for the Sega Mega Drive and Extreme-G and Extreme-G 2 for Nintendo 64. They were also well known for successful licensed games like Die Hard Trilogy and Alien Trilogy.
They made Extreme-G 3 and XGRA: Extreme-G Racing Association before Acclaim declared bankruptcy in 2004.