Here is one simple mod that would be very easy to add to the original UQM game without upsetting the balance or impose major development costs.
1. Among other "historical facts", Melnorme will reveal that the Alliance had a network of secret military labs developing a special ship weapon. During the war, the labs had to be abandoned as the planets were devastated by Ur-Quan bombardments. Melnorme will provide vague hints on location of three of them.
2. Locating the labs will require exploration of Ur-Quan bubble. Each planet will be guarded by 3 Kohr-Ar ships. Scanning the surface will locate an energy mark, which can be investigated for a recorded message.
3. Once all three recorded messages are obtained, the ship must visit Earth station. Two weeks later, Commander Hayes will have the exact location of the final lab. He will characterize the retrieval mission as "suicidal".
4. Upon arrival, the ship will be "greeted" by a mixed fleet of 3 Ur-Quan and 3 Kohr-Ar ships. They must be defeated - using main ship's escape pod FAILS THE QUEST.
5. The surface scan will reveal one energy object (ruins) and 30-40 bio markers. The latter will turn out to be surface war machines with moderate speed and major HP. The ruins will not react to the lander ("the entrance is blocked") until all war machines are destroyed. The battlefield is also "enhanced" with L4 seismic and L4 weather. Again, leaving the orbit results in irreversible quest failure.
6. When all war machines are destroyed and the ruin accessed, the message will contain the blueprints for a new weapon. The exact details of the weapon are subject to your imagination.
