Unreal Engine
My experience with Unreal Engine is creating mods during university, though my exposure to its latest updates has been limited.
Divine Conflict
A UDK mod featuring arena shooter deathmatches, where players choose a class and a god to worship, unlocking unique abilities and bonuses to dominate the battlefield.
The Revengening
A UT 2004 mod transforming the game into a magical battleground with a single-player campaign of revenge against elemental foes and a deathmatch mode where players wield diverse magic units, each with unique strengths and weaknesses.