Tuesday, 19th February, 2019, 09:48 PM
Certainly. Depending on ed, it can be quite a challenge, mainly for the DM, but sure, a number of times.
5e hard-caps at 20, like 3.x did before the Epic rules, 4e capped at 30, like 3.x did with the Epic rules, only playable.
AD&D had hard caps for some classes and most non-/demi- human race/class combos. But the basics - Human Fighter, Wizard, Cleric, Thief, etc - had no stated level...