We were off target by more than a month, but Ratchet & Clank: Before The Nexus has finally launched on both iOS and Android.

Before The Nexus brings Ratchet & Clank out of adventure platformer territory and into the endless grinding genre. Yes, that's right, you'll be riding grindrails for as long as you can manage.

Primarily, you'll need to hop across the grindrails to collect the bolts scattered among them.

But not just that. There are plenty of hazards to dodge, most of which are provided by familiar henchmen, such as Thugs-4-Life. And once you get past those, you'll get to take on bosses like Vendra and Neftin Prog.

Ratchet & Clank: Before The Nexus

With the bolts you collect you can purchase more weapons, such as the Buzz Blades, Predator Launcher, and R.Y.N.O. The bolts can also be used to upgrade these weapons, and buy new gadgets and armour, all of which should help you grind along a bit further.

You can also collect Raritanium, which can be transferred over to Ratchet & Clank: Nexus on PS3 if you sync up your PSN account.

Ratchet & Clank: Before The Nexus is available for free on the App Store [download] and Google Play [download].