What is Wade's plan to get to the Third Gate?

Wade's plan to get to the Third Gate is to breach the firewall at OASIS headquarters and then hack into the Sixers' private database. Once he obtains access to the database and deciphers the secrets behind IOI's weapons, Wade will be able to neutralize the Orb of Osuvox and bring down the shield that is enclosing Anorak's castle.
To realize his goals, Wade first alters the financial records of his Bryce Lynch identity to show that he owes a large amount of money to IOI. Wade knows that this is the only way to get himself indentured to IOI and to obtain access to IOI's intranet.
As predicted, Wade is arrested by IOI corporate police after he alters his financial records. At IOI headquarters, Wade tests his illegally obtained IOI passwords on the second night of his indentureship. In all, Wade spends almost a week hacking his way through IOI's intranet firewalls. Eventually, he gains access to the main Oology Division database and begins to explore the Sixers' private files. Wade is then able to gain control of one of IOI's SD-03 Supply Droids.
In chapter 34, the reprogrammed SD-03 Supply Droid detonates an anti-matter friction-induction bomb on Castle Anorak's observation platform. The bomb destroys the Orb of Osuvox that is generating the spherical shield over Castle Anorak. This opens up the way for Wade and his companions to get to the Third Gate.