A rich, ambitious, but ultimately heavy-handed adventure - great interactive fiction, but slow for adventure seekers.
So I tried Immortals of Terra. Admittedly, I knew nothing at all about "Perry Rhodan" as a fiction hero, and maybe that's part of what drove my disinterest.
The game, itself, is extremely well done in several aspects:
* Deep, long, and complex storyline that does a nice job of working in the books' deep, long, complex history.
* Huge numbers of characters to interact with along the way.
* Dozens of locations, all extremely detailed, well drawn, and generally very immersive.
* The visuals are top-notch -- better than most adventure games you'll play.
* Audio is generally very good. Decent soundtrack, some good (but melodramatic) voiceovers, lots of nice audio touches throughout with incidental sound effects, etc.
* Very organic puzzles (the puzzles are based on how things would unfold in "real life") that don't often get too contrived, but... (see the "not so good" below)
Those points said, I stretch to call the game "fun"... The negatives, for me:
* Lots and lots and lots of walking back and forth between locations.
* Some very contrived actions needed to get pieces of information -- for example, you may need to talk to the same character twice to get your info. That's fine, but simply talking directly to them twice in a row (without doing anything in between) works also -- nothing obviously drives the need to talk twice.
* Some puzzles are very long, and complex. This isn't a "bad", until you add the need to contantly walk, walk, walk between locales, and then do some odd action, again, twice. For example, you may look at an object, and Perry won't see some detail until you look at it a second time. This creates frustrating segments where you may wander about frantically clicking on every object in the game trying to elicit that final tid bit to open up a puzzle.
Overall, I found I _wanted_ to really like the game. However, the more I played, the more I waited for something bold and interesting to happen. Instead, even in a total crisis, everyone's utter calm took away from the moment. It's just all very flat, emotionally.
Again, to be fair, those interested in a very long, deep, and cereberal adventuring experience may well like this game. Also, those that know the Perry Rhodan universe may love it as well. But for me, I found myself wanting to wander off and play Mass Effect instead...