A prize pool of $1,500 is on offer this week at Grande Vegas Casino courtesy of its latest free to enter slots contest.The latest event runs until 31 May and challenges players to build up their highest scores on the ancient Greek-themed Achilles slot. This five-reel, 20-payline offering from Realtime Gaming is based on the classic story of the Trojan Horse and comes with plenty of features include a free spins bonus which can be triggered in two different ways.