We've had requests for combining rewards. Kickstarter doesn't provide a great way to do this - we could offer 100 different reward levels, but it'd get confusing fast! Here's what we suggest (based on what other campaigns have done):
Pick the types of rewards you want and how many you want of each. Pledge to fund us with that amount, but pick the $5 reward level. Send us a message letting us know that you've pledged $X, in exchange for these rewards. To give you a real example, if you want to receive 2 controllers, a T-shirt, and a base kit, you should contribute at least 2*$69 + $25 + $129 = $292.
As long as early bird reward prices are available, feel free to use those in calculating how much to pledge.
If you're ordering multiple rewards from outside the US, send us a message first before pledging and we'll get back to you with a shipping estimate.
If you've already contributed, you can adjust your pledge and the requested reward at any time until project funding ends.