When comparing Source 2 vs Shoot 'Em Up Kit, the Slant community recommends Source 2 for most people. In the question“What are the best 3D game engines?” Source 2 is ranked 42nd while Shoot 'Em Up Kit is ranked 55th. The most important reason people chose Source 2 is:
Source 2 is compatible with Source 1 models, materials and maps.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Compatible with Source 1
Source 2 is compatible with Source 1 models, materials and maps.
Pro Free for content developers
Pro NPC Generators
Control NPC spawning position, frequency, maximum enemy active at once, and maximum enemies created by the generator.
Pro Support for user-created HLSL shaders
Both model and post-process shaders.
Pro Great for shoot 'em ups
The name fits the functionality.
Cons
Con Not released yet
Has not been released yet for the public.
Con Lacking some details
No information on file formats or codecs in the manual.
Con Tutorials are too short and too old
The only real tutorial videos are 1 or 2 minutes long, and date from 2013.