Saboteur! is an action game published in 1985 for several 8-bit home computer formats by Durell Software. It was programmed by Clive Townsend.
The player is set in the role of an anonymous ninja, tasked with getting into a warehouse to steal a floppy disk which has the names of rebel leaders on it.
Source: Wikipedia, "Saboteur (1985 video game)", available under the CC-BY-SA License.