Grandslam Interactive Ltd. (formerly Grandslam Entertainments Ltd. and later Grandslam Video Ltd.) was a video games software house based in Britain. It was formed in late 1987 from the ashes of Argus Press Software by former Argus Managing Director, Stephen Hall and close friend David C. Dudman. Grandslam developed and published many games for home computers during the 1980s and 1990s. Originally based in central London, the offices were relocated to Croydon in 1990.

Also Known As

• Grandslam Video Ltd. (from 1991 to 1994)
• Grandslam Entertainments Ltd. (from Dec, 1987 to 1990)

• Reunion (1994)
• Terramex (1987)