Why don't video games make it to all consoles?

Mostly because the game isn’t selling as well as they had hoped, and the cost of converting it to another console would be more than they would make back from sales for that console.

Don’t forget there’s also fees and whatnot. For example, if you want to sell a game for the Playstation, you have to pay a fee to Sony for the right to use their software (which you must use in order for your game to work on that console)

Depends on a lot of things. Some games, like Call of Duty, for example, depend on online play as a major selling point. The Wii, while a good system, doesn’t have a very functional or dependable online service when compared to XBL or PSN services. Similarly, hardware limitations often limit the number of games that can be developed for a certain system, IE games like Killzone or Halo couldn’t run the way they were envisioned on the Wii, and the same reason explains why a lot of PC-exclusive titles just stay that way.

Also, sometimes exclusivity is a selling point for a console. Even if it’s a totally jerk move..

It takes a LOT of work to re-write the game for each console. Also some consoles don’t have the horsepower to drive some of the more demanding games, and so the designers either have to use shittier graphics, lower frame rates, and other things that make the game worse to accommodate the hardware, or they just let it run as is and it will be very choppy/buggy.

Let us not forget licensing and other similar exclusivity deals. For instance, the Gran Turismo series of games is developed by Polyphony Digital, a subsidiary of Sony.

Now, tell me what you think the odds are that Sony will go through the hassle and expense of revamping a flagship title like that for a competitor’s console.