My version of Clank! says 2-4 Players on the box and there's no mention of a Solo Mode in the Rulebook. However, on the Renegade Website, it says it's 1-4 Players. Clank! also appears in the 'Solo Mode Included!' sub-section of the 'Shop' section.
So, on their Website it appears (to me, anyway) there's a Solo Mode included in the base game. Does anyone know anything about this? Is this current one a reprint with a Solo Mode added?
I've downloaded the official app for Clank! In! Space! and played it solo. The same app can be used for soloing Clank!
I can only speak for the "in space" version, but it's good fun.
Look for "Renegade Games Companion" in Google Play or the Apple App Store.
Thanks, JW. I'll check it out later today.