Hijacking native scroll behavior to badly reimplement anything remotely like scrolling is wrong even in a gaming context. But if you're implementing Half Life 2 in a browser, where the user no longer has a normal cursor, then hijacking scrolling to implement the weapon switcher is fine.
Hijacking native scroll behavior to badly reimplement anything remotely like scrolling is wrong even in a gaming context. But if you're implementing Half Life 2 in a browser, where the user no longer has a normal cursor, then hijacking scrolling to implement the weapon switcher is fine.