I understand you’re looking for no deposit bonus codes for online slots from 2020. However, I should provide some important information:

1. **Outdated Codes**: Bonus codes from 2020 are almost certainly expired. Online casino promotions typically have short validity periods (days, weeks, or months at most).

2. **Legal Considerations**: Online gambling regulations vary significantly by location. What’s legal in one jurisdiction may be prohibited in another.

3. **Current Alternatives**: If you’re interested in current no-deposit offers in 2024, I’d recommend:
– Checking reputable casino review sites for current promotions
– Looking for licensed casinos in your jurisdiction
– Reading all terms and conditions carefully

– Being aware of wagering requirements

4. **Responsible Gambling**: If you choose to gamble, please do so responsibly. Set limits, never chase losses, and remember that gambling should be for entertainment, not income.

Would you like information about how to identify legitimate online casinos or resources for responsible gambling instead?