Prompt Title: Soft launch user acquisition.

Sure, I can provide you with some strategies for a successful user acquisition campaign for your soft launch.

1. Define your target audience: Before launching your campaign, it's essential to understand who your target audience is. This information will help you to optimize your ad campaigns and make sure you reach the right people. In the case of a racing game, your target audience may be gamers who enjoy racing games, or people who are interested in motorsports.

2. Create engaging ad creatives: Your ad creatives should be visually appealing and give potential users a good idea of what your game is about. Consider using video ads that show gameplay footage, as this can be an effective way to showcase your game and entice users to download it.

3. Use social media channels: Social media can be a great way to promote your game and reach a wide audience. Consider using platforms such as Facebook, Instagram, and Twitter to advertise your game and engage with potential users.

4. Partner with influencers: Influencer marketing can be a highly effective way to promote your game and reach a targeted audience. Consider partnering with influencers who have a following that aligns with your target audience.

5. Offer incentives for downloads: Incentives can be a great way to encourage users to download your game. Consider offering in-game rewards or special promotions for users who download and play your game.

6. Optimize your app store listing: Your app store listing is the first impression potential users will have of your game, so it's essential to make it as appealing as possible. Use screenshots and videos to showcase your game, and make sure your description accurately reflects the game's features and mechanics.

7. Monitor and adjust your campaign: Once your campaign is live, it's important to monitor its performance and make adjustments as needed. This could include tweaking your ad creatives, adjusting your targeting, or testing different incentives.

By following these strategies, you can increase your chances of a successful user acquisition campaign for your soft launch.