Set to play Champions League football in the coming season, the move marked the Black Star's incredible rise to the top, having found himself in the Spanish second tier only two years ago.
"[It's] a dream came true," Adams told his new club's official website.
"It was a big goal of mine to play in Germany, which is incredible for me.
"The stadiums here are always full, the atmosphere is great and the games are shown in my home country
"Many famous Ghanaian footballers have played in the Bundesliga, so it's so popular."
Adams is the third Ghana international to get onto the books of Hoffenheim, following in the footsteps of Prince Tagoe and Isaac Vorsah.
It comes as no surprise, then, that the former Real Mallorca man reveals consulting the latter on the move.
"He [Vorsah] reported only good things and gave me a very good feeling - but I had that discussion after meeting with [club manager] Julian Nagelsmann anyway," the Kumasi-born disclosed.
"We talked extensively. This is a very good club that wants to play beautiful and successful football.
"Hoffenheim is a very good step for me.
"I will change my playing style and adapt to their style. They mostly play a 3-5-2 system.
"I will do my best to help the team and to adapt quickly."