[pearle]

The Creation engine by Bethesda is still highly mod friendly. For example, there is a fan-made total conversion mod being created for TES V: Skyrim that is a remake of TES III: Morrowind [1]. Also, the SureAI team is creating Enderal, a total conversion mod in a completely different setting [2].

[1] http://tesrenewal.com/blog/blog-post-march

[2] http://sureai.net/games/enderal/?lang=en

[digi_owl]

Quake got crazy mods like Airquake, made initially by one guy.

https://www.youtube.com/watch?v=X173LZkEgYc