TL:DR Great Jumpstart Please note, this review is from the Advanced PDF and some points mentioned here may change when the final product is released. Welcome to the Rock is a jumpstart for Technocracy Reloaded for M20. Like most jumpstarts it consist of basic rules for the game, a scenario, and ready-made characters. The basic rules section is easliy the best thing I've seen in writing to explain how mage works. I would recommend it to anyone looking to get into Mage. The lack of Technocracy specific weapons seemed kinda off to me. The scenario was a fun read, though there could another maybe half a page for some additional NPC stat blocks. Ready-made characters were pretty good. There's six in total. I would absolutely use some of these NPCs in other scenarios. Overall this jumpstart is a pretty good value, and a fair amount of it can be used as a quick reference in othe M20 games. Mechanics, character creation, some fund enhanced equipment and procedures. If you play Mage, pick this up. If you don't play Mage and you're looking for a good way to get in without having to read a 700 page book, pick this up.