Yes - all you need to do is to click Back This Project / Make a pledge without a reward
However, your pledge unfortunately won't contribute to reaching the stretch goals. We already have our shipping partners lined up for this project, so the eventual shipping cost is very unlikely to differ from what you see in the Shipping table. It's better to jump in now :)
1. Click on the “Manage your pledge” green button at the top of the page
2. On the next screen, click on the “Change your pledge” blue button
3. Then, in the current reward box you’ve chosen, increase the pledge amount by the price of the addon, then click on the “Continue” button
4. On the window that appears, click on the “Confirm” button.
Anachrony, the Exosuit Commander Pack and the Doomsday Enhancement Pack will be available. However, we will be in between print runs for Trickerion at that time, so I'm afraid that game won't be available from the pledge manager.