For consoles/computers that you have owned pick just one game that you genuinely think would be well worth the cost of the system to play, not factoring in other games that you could get. Perhaps considering the price at the time as well as what you would need to pay now. And if a system doesn't really have anything that would be worth it say that also. I think it's reasonable to factor in the availability of a game on other more modern systems too, which might make getting something old not that worth it.

Basically imagine you were talking to a friend and it's like you're saying "You should absolutely go and get a ___, just so you can play ___".


PC - Total War: Warhammer II
For me I really think this is worth the expense of building a high-end PC just to play. It's just so endlessly cool, all of the little faction unit models and details, unique abilities and playstyles, and combinations of them you can muck about with in custom battles. It really is the sort of thing you might dream of as a kid, and it's just so well realised as a whole with pretty smooth interface design and mostly easy to understand mechanics. Seeing a Stegodon charge down and through a massive cluster of troops, sending dozens of fiendish ratmen flying through the air never gets old. Some of the effects are so satisfying too, like the Sisters of Averlorn's magical arrows, the lighting and little sound effect as they chew through the enemy is fantastic.

It's something you can just get lost in. Along with Civilization 5 this is one of those games that I sincerly wish I could go into some kind of suspended animation and play in my mind for weeks at a time while only an hour passes in the real work. Would be practical too considering I've racked up 236 hours of playtime so far, and it's ever rising. So I consider this a killer app, even considering the not insubtantial cost of a system that's required to run this to it's full potential.


PS3 - Demon's Souls
Still yet to see a release on another platform, and there's no need for me to explain the allure of this one here. Plenty of depth and things to try on new playthroughs.


Xbox 360 - Hmm not sure of this one, nothing really jumps out at me from memory as being really worthwhile.


Xbox - Halo: Combat Evolved (obvs)

Nintendo DS - Again, nothing stands out as being really essential.

Wii/Gamecube - Metroid Prime
Never played much on the Wii apart from replaying Prime, so I've lumped the two consoles together. Not much to say other than it's basically the best game I have ever played, so many great memories of the details of the world, the sounds. And as I found out from my replay on the Wii it absolutely still holds up as something really enjoyable to play and explore. Still waiting on some kind of successor, spiritual or otherwise.

A runner up here would be Zelda: Wind Waker for me, but I haven't played that again recently so perhaps not.


GBA - Advance Wars


PS1 - Hmm, FFVII I guess..?


Gameboy - The Legend of Zelda: Link's Awakening