$150k is what is costs to make a full serious game. That's from acquisition, conception, requirements elicitation and engineering, instructional and game design, programming, animation, voice work, etc. until delivery, including profit margin, renting studios and the lot.
That usually takes a team of 4-5 persons in various makeups up till 10 weeks.
Sure it gets a lot less QA, and they'll reuse some assets, but definitely not as much as this character will, which already has the complete game around it.
This guy on the first page has gotten it right imo.