- Expedition: With several exceptions, higher rank expeditions yield more marks than lower rank expeditions. Boss expeditions yield far fewer marks than non-boss expeditions.
- Goals Completed: The most important factor in receiving the highest marks reward is the completion of Goal 3.
- Number of Participants: More participants will yield more research marks per player. From a baseline amount at three players, the bonus per player is 20% for four players, 40% for five players, and 60% for six players.
Research Marks can be expended for reward items at the following NPCs:
- Burrow Investigator (Upper Jeuno - I-8)
- Burrow Researchers
See the NPC pages for a full list of purchasable reward items. Note that Burrow Researchers only sell rewards associated with their location while the Burrow Investigator sells all rewards.