Force.com Apex code for making a field appear to be required on a Visualforce page.

Faux Visualforce Required Field.html

<!-- update "Object_Name__c" with your Object, and "Field_Name__c" with your Field -->
<apex:pageblocksectionitem helpText="{!$ObjectType.Object_Name__c.Fields.Field_Name__c.inlineHelpText}">
	<apex:outputlabel value="{!$ObjectType.Object_Name__c.fields.Field_Name__c.label}" />
	<apex:outputpanel layout="block" styleClass="requiredInput">
		<apex:outputpanel layout="block" styleClass="requiredBlock"/>
		<apex:inputfield value="{!Object_Name__c.Field_Name__c}" />
	</apex:outputpanel>
</apex:pageblocksectionitem>