As title sais. It's an instant buy if you don't have any quarrel(hey, did I even use this word right? :D ) with Steam and you like X-Com. And you don't already own it which, I'd say, most of you would :D

I picked up the Terror from the Deep sequel when it was released quite a bit ago.
Fun game, but sits on the very difficult side.

I've been interested in the series but I've not been sure about it.

oooh oooh oooooooooh I wish I didn't hate steam... Well not even hate but just find it annoying and don't want it on my lappy.
Hmm theres a thought, wouldn't the xcom games go great for the xbox arcade?

Sweet! It's also 5 bucks in the US! At that price its worth buying it, even though I already own Interceptor.

Not to be rude but; how?

I don't know what an xbox arcade is, but if it's like the xbox console, it lacks the mouse you always want in this kind of game.
The only thing that puts me away from this kind of deal (downloading an X-COM bundle cheap) is that both games (I couldn't find the item in question but it must be UFO defense + Terror from the deep) will hardly work even with DOSBox (certain version don't seem to get along with newer video cards for example).
Now if it was a hard copy (say CD in jewelbox and cover, not a download), I'd happily ignore this fact and like to own it even if it didn't ran in any computer...

the xbox 360 has keyboard and mouse support

Wow, and do people actually use it? Why not using a PC instead? I know that's completely off-topic but... damn.
Well, knowing that, you know X-COM could be properly played in an X360, though I must say I don't see many people digging ports of old classics for newer systems... I do collect them when I can (PS2 was keen at re-launching old classics), but all my friends simply ignore them.

well, it's unofficial support. and if people didn't dig ports, you wouldn't see stuff like sonic 2, digdug, tmnt arcade, banjo kazooie, duke nukem 3d, ultimate mortal kombat 3, castlevania, pacman, centepede and milipede, contra, defender, doom, discs of tron, double dragon arcade, ecco the dolphin, frogger, fatal fury, gauntlet, frogger 2, galaga, ms pacman, paper boy, super puzzle fighter, robotron: 2084, rootbeer tapper, just to name a few.

A fair amount of the Steam catalogue is only available in North America and parts of Europe. Shame.
Any friends or trustworthy netizens you can get to gift you the game?

Yes, I have. But not a friend, my cousin. I will talk him about it and he will send me gift.

Well first and foremost I'm glad you're not being rude, it's a rare thing to find on the internet, thanks.
If anything, I think that the xcom games (at least 1 & 2, I never found Interceptor) and other turn based strategy games are one of the few game types where conversion to a console could retain a nearly identical experience.
The Xcom games are turn based so accurate and fast mouse movement like you get in an RTS (and dismally fail to get in a console RTS) wouldn't be needed. The in-mission movement & targetting is already based around a box system which would work perfectly well with either the analogue stick or the dpad.
Secondly the 360 (and presumably ps3 but I've not seen it) controller has a good number of buttons letting you map a lot of normally icon based commands directly to a button input. Failing, that a single button press could change focus from the main game screen to the different command panels, say the action bar thing where you tell soldiers to kneel, go upstairs, reserve APs when moving or change the view. Accessing that bar in this hypothetical version would simply highlight the icon and pressing A would have the same effect as a left click. If I was designing it myself, I'd probably map changing the view height to up & down on the dpad and next/previous soldier to left & right because those were the non-combat controls I used the most by far.
The one major area where you'd NEED to change to keep a good flow of gameplay would be the world map, particularly for UFO interceptions, however there's 2 ways I can see of keeping the majority of the functions. First you could assume that the player is only going to deploy craft for intercepts and recovery missions, if you did that you could have a list of targets pop up when you access the craft in question and it'd fly to it without having to manually click. The alternative is to allow the creation of waypoints for the craft to fly if you wanted a patrol. It could also be good to implement a pause time command system when the player accesses the craft, this could allow for the careful selection of waypoints or targets without punishing them for the lack of combined speed & precision that a controller just can't give.
Other than that it'd be a copy & paste of the gameplay. I see no reason that base building, research and all the other features can't remain identical. Sure the konsolekiddies might bitch that it's slow and boring but add an updated graphics option with pretty explosions and their minds will be occupied by the pretty flashy things for hours.

So Steam still operates on the wonderful principle of $1=€1. As long as they keep shafting the Europeans (especially those that don't even use Euros, like me), I'll stay far away from Steam. I hope I'm not alone in this. If people just accept it, expect to be shafted even more in the future.
[EDIT] Yes, I know. €5 for this game bundle is an absolute steal, but that is not the issue. It doesn't matter how good a deal it is, as long as everyone aren't getting the same deal, better or worse.