It will most likely make you less desirable for some people and/or studios, compared to an unadorned human. Get the wrong interviewer and you might be racking up some negative points due to their personal opinions and ideals, even subconciously.

In general though, this industry tends to be quite used to strange-looking misfits. Just look at the people in an average art department and you'll see lots of strange stuff.

Industry's look on tattoos etc.
what are the views upon these things in the games industry (employment wise) anyone who has been in the industry and knows about the policy.

There is no such thing as "the policy." And in a sense, there is no such thing as "the industry" in the sense that everybody in the industry thinks alike.
The industry is made up of individuals, many of whom have tattoos and piercings. Long hair, no hair, weirdbeards, we get it all.
If you had a tattoo on your forehead that said "f-bomb you," then you should wear a hat to the interview, and never ever take it off on the job.

I can only really repeat what was said above, but with some examples.
In my previous company a coworker had some of his tattoos removed to avoid trouble getting/maintaining a job.
On the other hand in my current workplace there are several people covered in tattoos, one guy with a bright-red mo-hawk and spiked collars, and a woman who wears neither bras nor shirts.
This basically just exemplifies what was already said about it being fairly random and entirely dependent on the company/interviewer.


L. Spiro

If this really worries you, prove your look is completely irrelevant.

If you're a programmer, start right now into Open Source, contribute actively. Get yourself noticed. Instead of going to interviews, make the interviewers come to you because you're good at what you do. Let them see your knowledge on architecture, rendering, game engine concepts, etc; exceeds that of an employee who graduated 5 years ago.

If you're an artist, start right now in building a portfolio, being in relevant sites (i.e. cgsociety, game-artist.net), participate in contests (i.e. Dominance War) etc. etc. Same rules apply as programmer. I'm a programmer, so of course I can give more examples.
Instead of going to interviews, make the interviewers come to you because you're good at what you do. Let them see you're not only really good, creative artist; but you're also familiar with the game dev. workflow: creating Havok collision bodies, modelling low poly, creating occlusion geometry, exporting process, that you know how important is to keep UVs & smoothing groups consistent across the triangle (so vertices don't get duplicated), etc etc

Cheers.