A developer from defence-force.org site provides an Oric Atmos version of Impossible Mission game (inspired from C64 version). We can download it here and watch a video. Its sequel (Impossible Mission II) was an addicting game (also frustrating) on Atari ST.
We can also find an Oric version of Stormlord, and finally Space:1999.
A recent Oric emulator, Oriculator, is available for MacOSX.