status/ExplosionSizeStatus.cs
using System;
using System.Collections.Generic;
using System.Linq;
using Sandbox;

[Status( 5, 0, 1f, 0, false, typeof( GrenadeShootReloadStatus ), typeof( FearDropGrenadeStatus ) )]
public class ExplosionSizeStatus : Status
{
	public ExplosionSizeStatus()
	{
		Title = "Bigger Booms";
		IconPath = "textures/icons/explosion_size.png";
	}

	public override void Init( Player player )
	{
		base.Init( player );
	}

	public override void Refresh()
	{
		Description = GetDescription( Level );

		Player.Modify( this, PlayerStat.ExplosionSizeMultiplier, GetMultForLevel( Level ), ModifierType.Mult ); ;
	}

	public override string GetDescription( int newLevel )
	{
		return string.Format( "Increase the size of your explosions by {0}%", GetPercentForLevel( Level ) );
	}

	public override string GetUpgradeDescription( int newLevel )
	{
		return newLevel > 1 ? string.Format( "Increase the size of your explosions by {0}%→{1}%", GetPercentForLevel( newLevel - 1 ), GetPercentForLevel( newLevel ) ) : GetDescription( newLevel );
	}

	public float GetMultForLevel( int level )
	{
		return 1f + 0.3f * level;
	}

	public float GetPercentForLevel( int level )
	{
		return 30 * level;
	}
}