User blog comment:867428/Titans in Alternate Reality./@comment-35417358-20160627041453/@comment-19654153-20160627043935

This slightly reminds me of the live action movies, with the different reality and similar plotline. :/ Except expendable weapons such as explosives were really scarce and could only be used on one Titan in the end. Unless people in this AU had the ability to fly then I guess 3DMG would still be the most effective type of weapon.

Might be a little off-topic, but in the original manga Titans are able to adapt their skills, i.e. learning how to climb trees. That may or may not be the same case for swimming, though.