Short answer. No. A judgment against a party in default cannot exceed the amount prayed for, cannot be different in kind from what was prayed for, and cannot award unliquidated damages. The claimant's own prayer becomes the ceiling on what losing by default can cost you.
What the law says
shall [neither] exceed the amount or be different in kind from that prayed for nor award unliquidated damages
Rule 9, Section 3 — Default; [d]eclaration of. Read the full provision →
The prayer sets the ceiling
Default is not a blank cheque. Losing by default means the court may grant the claimant such relief as the pleading warrants, but the rule then caps that relief in three separate ways: it may not exceed the amount prayed for, it may not be different in kind from what was prayed for, and it may not include unliquidated damages. So if the complaint asks for six hundred thousand pesos, a default judgment cannot come back at nine hundred thousand. If the complaint asks for money, the court cannot instead order you to convey land. The document you failed to answer is also the document that limits your exposure.
Why unliquidated damages are excluded
Unliquidated damages are those whose amount is not fixed by the agreement or ascertainable by simple computation, with moral and exemplary damages the familiar examples. They require proof and, normally, a real contest over how much. The rule keeps them out of a default judgment because there is nobody present to test them. This is one of the more useful protections for a defaulted defendant, since the sums that are hardest to predict, and easiest to inflate in a prayer, are precisely the ones the court cannot award on default alone.
The court may still require evidence
Being in default does not automatically mean every allegation is treated as proven. On declaring default the court proceeds to render judgment granting such relief as the pleading may warrant, unless the court in its discretion requires the claimant to submit evidence, and that reception of evidence may be delegated to the clerk of court. So a claimant with a thin complaint can still be made to prove the claim before anything is awarded. That discretion belongs to the judge, however, and is not something a defaulted party is in a position to demand.
What this is worth to you
Read the prayer of the complaint carefully even if you have already been declared in default, because it tells you the worst realistic outcome. If the judgment that eventually issues goes beyond that ceiling, awards something different in kind, or includes unliquidated damages, that is a specific and identifiable defect rather than a general complaint about the result. It remains far better to move to set aside the order of default before judgment, which the rule separately allows on a showing of fraud, accident, mistake or excusable negligence together with a meritorious defence.