Modders have created a project called Halo Goldsource, which merges the Halo and Half-Life franchises by recreating Halo's multiplayer experience using the Half-Life engine. The mod includes familiar game modes like Slayer and Firefight, along with remade maps and original arenas. However, it struggles to capture Halo's unique movement mechanics and lacks vehicles, which are essential to the Halo experience. This results in gameplay that feels different from traditional Halo, potentially disappointing purists who prefer the original games.