This is a game based on the type-in game Captive that appeared in the book "Creating Adventure Programs on the BBC Micro" by Ian Watt, published in 1983. Soft copies of this book can be found online.
The original game is a text adventure where you are given descriptions of your environment, and you type in commands. You are a captive of aliens on a planet that is about to blow up, and you have to find a way to escape. You have a limited number of turns to do this, before the planet blows up. You have an inventory that can carry a limited number of items (4 in the original game). Each room can only hold a limited number of items (4 in the original game).
This is the game map. Room numbers are in square brackets. The room numbers were used in the original BASIC game, but are not used here. The contents of a room are in parentheses.
+--------------+
| [21] |
| Outside of |
| Ship |
| |
| |
| |
+--------------+-----|xx|-----+--------------+
| [18] | [20] | [12] |
| Observation | Air Lock | Altar |
| Point - (LOCKED DOOR)| (SABRE) |
| (WINDOW) (BOULDERS) | |
| - | |
| | | |
+--------------+------| |----+--------------+-----| |-----+--------------+
| [19] | [17] | [14] | [10] | [13] |
| Repairs | Brightly | Dimly lit | Area With | Place |
| Room - Coloured - Passage - a Hole in - Beside a |
| (WIRE) Room the Ceiling Monolith |
| (AERIAL) - (MAGNIFIER) - - (HOLE) - (INSCRIPTION)|
| | | | | (SWARCK) |
+--------------+--------------+--------------+-----| |-----+--------------+
| [9] | [7] | [8] |
| Padded cell | Signal | Room of |
| (HEADPHONES) - Transmitter - Chains |
| Room (ROUGH METAL)|
| - (TRANSMITTER)- |
| | | |
+--------------+--------------+----| |------+-----| |-----+--------------+
| [6] | [4] | [5] | [11] | [16] |
| Wall with | Gunpowder | Place with | Muddy Area | Frozen room |
| Scratches - Chamber - a Rocky | (MUD MAN) - (ICE BLOCK) |
| (SCRATCHES) (GRENADE) Floor | |
| - - (GLOVES) | - |
| | | | | |
+--------------+-----| |-----+--------------+-----| |-----+--------------+
| [3] | [2] | [15] |
| Winding | Bell Tower | Locksmiths |
| Staircase - (BELL) | (KEY CUTTER) |
| (TORCH) | (SHINY KEY) |
| - | |
| | | |
+--------------+-----|xx|-----+--------------+
| [1] |
| Prison Cell |
| (DOOR) |
| |
| |
| |
+--------------+