Neruz
Rogue Spiderbanana
- Location
- The Land of Fire and Poison
IIRC that was a semi-serious thing from Rogue Trader; the Mechanicus sent a probe outside the galaxy and once it was clear of the Milky Way, it picked up Ork transmissions coming from literally every galaxy it could detect.Regarding other galaxies, I remember reading somewhere that the cog boys have sent probes to nearby galaxies. Everyone of these probes has picked up Ork transmissions ...
Recentish Necron canon also seems to be that the Void Dragon's minions had reached and colonized at least one other galaxy, and of course the Tyranids are extragalactic, though that doesn't necessarily mean they come from another galaxy.
Those are, AFAIK, the only canon instances of anyone going out of the galaxy; the Tyranids, Necrons and probably the Orks, through sheer random chance if nothing else. Warp-based travel beyond the galaxy is effectively impossible due to the distinct lack of landmarks in the extragalactic immaterium to navigate by, guaranteeing that anyone who attempts it gets quite thoroughly lost, even Chaos Gods, so only the Necrons with their ability to tell physics to get fucked without using the Warp and the Tyranids with whatever the hell they use can reliably cross intergalactic space.