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

[Status(5, 0, 1f, 0, false )]
public class GrenadeShootReloadStatus : Status
{
	public GrenadeShootReloadStatus()
    {
		Title = "Reload Grenade";
		IconPath = "textures/icons/grenade_shoot_reload.png";
	}

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

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

	public override string GetDescription(int newLevel)
	{
		return string.Format("{0}% chance to launch a grenade when you reload", GetPercentForLevel(Level));
	}

	public override string GetUpgradeDescription(int newLevel)
	{
		return newLevel > 1 ? string.Format("{0}%→{1}% chance to launch a grenade when you reload", GetPercentForLevel(newLevel - 1), GetPercentForLevel(newLevel)) : GetDescription(newLevel);
	}

	public override void OnReload()
	{
		if(Game.Random.Float(0f, 1f) < GetChanceForLevel(Level))
        {
			var pos = Player.Position2D + Player.AimDir * 0.5f;
			Player.SpawnGrenade( pos: pos, vel: (pos - Player.Position2D) * Player.Stats[PlayerStat.GrenadeVelocity] );

			Manager.Instance.PlaySfxNearby( "grenade_shoot", pos, pitch: Game.Random.Float(1.4f, 1.55f), volume: 0.42f, maxDist: 4f );
		}
	}

	public float GetChanceForLevel(int level)
	{
		return level * 0.2f;
	}
	public float GetPercentForLevel(int level)
	{
		return level * 20;
    }
}