Captive is a classic Tony Crowther game, published by Mindscape in 1990. It is a futuristic, first-person RPG/action game in the style of Dungeon Master.
At first I didn’t really much like the game – I thought the graphics were dated and garish and the controls finicky – BUT… after a bit more reading/research I managed to get a foothold in the game and I really started to enjoy it.