Defence Force Games


Elvin Atombender is seeking world domination again. This time through an Oric near you!

Impossible Mission was an absolute classic game on the Commodore 64 with conversions for most other micros of the era.

The aim of the game is to locate puzzle pieces hidden in furniture spread across all the rooms in a large underground complex then assemble the pieces into punchcards that will form letters for the final Passcode into the Control room to finally foil Elvin's plans. Is that enough?

System Requirements

To play this game, you need a 48KB Oric system1 with a tape player, or an emulator2 providing the equivalent feature set.

The game is compatible with the Oric Atmos (ROM V1.1) model only currently.



You can download the current version of the game here:

Impossible Mission 1.0 - for Oric Atmos only(48 kb)
Impossible Mission 1.0 - for Oric Atmos only - 60hz version (48 kb)

Due to differences in the ROM and the use of it for Tape routines (saving game) this game currently will only run on a V1.1 ROM machine (Oric Atmos). Watch out for Oric-1 versions in the near future.


To load the game

Loading a game from a system with disk drive

Loading from a system without disk drive

Select the tab at the top of the page for instructions on each area of the game


All code, graphics and sound coded and composed by Twilighte 2010.

Testing performed by Symoon, Chema and Dbug

Additional help from kml, Groepaz, Chema and Dbug

The graphics are all original, with inspiration always from C64 version


If you like the game, if you have questions, if you want to post encouragement messages or suggestions, feel free to register on the Defence-Force forums and post your message in the official Impossible Mission feedback and review thread

1) This includes the Oric Atmos. OSDK is not compatible with the first, original, machine in the Oric range (the Microtan 65). If you never heard of the Oric before, you can read about it on Wikipedia
2) This game should be compatible with the following emulators: Oricutron, Euphoric (and derived versions like Caloric or XEuphoric), Mess, Atoric, Amoric, and probably some more.