I'm not an expert on computers and I'm not an expert on computers could I play 2.8 GHz games on a 2.3 GHz laptop I don't have the money for a 2-3k laptop nor the room for a PC
noel: Maybe, but your question is more complicated than you realise.
There are several things that determine game performance, and CPU clock speed is only a minor one of them. A new generation 2.4 ghz CPU may be MUCH more powerful than an older 2.8 unit. Just more efficient internal designs, faster memory etc. So that's a maybe. Also different models with the same clock speed will perform differently, especially when you are comparing AMD to Intel chips.
BUT, your main issue with gaming is the GPU, or Graphics Processor. Any game will give you a minimum and suggested GPU. If you don't have that, your CPU wont matter, its not going to work. And this is where cheap laptops let you down. They usually have a low power "integrated" GPU, built into the CPU or motherboard. This is fine for normal computing stuff, but not for gaming.
Now the problem with GPUs is they they cost money, they use power, and they get hot. The last 2 are big problems for laptops (and the price is a problem for you). This is why "gaming" laptops cost a lot. They need extra GPU chips, exotic cooling to stop them melting, and bigger batteries to keep them running. = Expensive.
Sorry that's not what you want to hear, but it explains why most gamers end up with a mini-tower case PC.
I'm not sure what you mean by 2.8 Ghz games, so I'll assume you mean a game that recommends a 2.8 Ghz processor. If otherwise, please disregard.
It's rare these days for a game to require a specific processor speed in the true sense of the word. Namely, the game will probably run, but it might not run very well. Depending on the type of game, this could not be a problem for you. If it's something slower like a turn based game, a it'll be annoying but not completely impossible. If it's a real time shooter or some such, the bad performance could be so bad as to render the game virtually unplayable.
There is no such thing as a 2.8GHz game. You most likely misread the system requirements.
As for processors, clock speed isn't important. An 8 core 2GHz Xeon would crush a 2.5GHz Pentium. In terms of minimum specs, memory is the only really important one, and even that is just a suggestion. You should be fine.
What video game is it exactly?