The third birthday

The RPG elements are limited to upgrading your weapons and your DNA, you get new DNA pieces by diving into enemies through the overdrive mechanic. Upgrading your weapons are a must, starting out with only 180 bullets in your assault rifle puts your in a tough place, and eventually I ended up with being able to hold 900 at a time. The DNA upgrades were always a bit of a mystery for me though, the game doesn’t do a good job at teaching you what you need to do to take proper advantage.