OCS is a directory of certified online casinos, gaming software, and casino gambling information. Online casinos have brought gaming to the desktop, and along with online gaming technology comes the opportunity for scams. The online casinos represented here possess certification and are monitored for reliability and fairness of casino software and excellence in customer service. Our top 10 online casino sites were updated on March 4, 2010.
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| Rank | Casino | Bonus for New Players | Review |
| 1. | Go Casino | 100% up to $20,000 | Review |
| 2. | Online Vegas | 100% up to $5,000 | Review |
| 3. | Millionaire | 100% up to $5,000 | Review |
| 4. | Lucky Red | 400% up to $4,000 | Review |
| 5. | Pure Vegas | 100% up to $2,400 | Review |
| 6. | Rushmore Casino | 100% up to $888 | Review |
| 7. | Allstar Slots | 100% up to $787 | Review |
| 8. | VIP Slots | 100% up to $777 | Review |
| Rank | Casino | Bonus in ₤ or € | Review |
| 1. | Allslots | 100% up to ₤, € 200 | Review |
| 2. | Villento | 100% up to ₤, € 100 | Review |
| 3. | Mansion Casino | 100% up to ₤, € 200 | Review |
| 4. | Roxy Palace | 100% up to ₤, € 100 | Review |
| 5. | Casino Tropez | 100% up to ₤, € 3,000 | Review |
| 6. | Jackpot City | 100% up to ₤, € 200 | Review |
| 7. | Crazy Vegas | ₤, € 3,000 | Review |
| 8. | Virgin Casino | 100% up to ₤, € 100 | Review |
Go Casino undoubtedly offers one of the best - certainly the largest - ongoing online casino bonuses there is on the internet today. Valued at $20,000, Go Casino will pay 20 consecutive match deposit bonuses (100%) up to $1,000 each. The play-through is only 20x and normal game restrictions apply. Powered by Vegas Technology Online Casino Software, regulated and licensed by the Curacao Internet Gaming Association (Curacao Gaming Control Board under the dominion of The Netherlands), this is one U.S. facing gaming site fostering safety and security for all.