Netbooks were not designed for gaming in mind. You may be able to run older games at low settings but even then it would not be a very playable or enjoyable experience. Your best bet would be with browser based games like flash games.

The games you've mentioned should run very well on a netbook. A lot of games from the early Winodws XP and late Windows 98 era might also run very well. I have the N230 Atom processor in one of my PCs and can play a lot of games of that time. In general I would say everything that has graphics below DirectX 8.1 should be fine, but experiences can differ and so you should try games out first before you buy them.

An Intel based Netbook, would not be my first choice for gaming, but it should run those games your talking about well enough, and you might be able to get away, with some lowend freeware games, and some Emulation, as I'm able to run NES, SNES, Genesis/MegaDrive/Master system/Game Gear emulators, on my cheap $200US VIA C7M 10in netbook, with only 1gig or Ram, and a 2 gig USB stick for readyboost, running Win7 Ultimate 32bit, at acceptable levels, like when I'm stuck at the Dr's office. If in the near future, you can find a good AMD Fusion based Netbook, something like that, should be able to pull off some light gaming task.

Believe it or not, even modern games (like Blizzard's "World of Warcraft" and "StarCraft 2") will play on many AMD and Intel based netbooks, but on the most basic graphics settings. I've even run Source games on them.

You are not looking for spectacular graphics here. It is going to be the worst you can make the games go, but it will play acceptably if you can tolerate 10-12fps.

Newer netbooks are seeing dual-core processors and more advanced graphics systems, and have the mobile gamer in mind, but, of course, you'd have to buy one!