So I want to play minecraft and Starcraft II but the only way

>>377931
GT 1030 is designed for starcraft.

There's also RX550, which is better performing, sometimes cheaper, and uses more power.

>>377931
You can also try looking for a 730, but until 10x0, all cheap graphics cards have been shit.

Your other other option is to put something stupid like a 670 in it. These cards are cheap (because they're obsolete), offer entry-level performance (comparable to a new 1050), but use nearly 200W doing it.

>>377931
You could try gumtree/craiglist/classified for an old GTX 750Ti/660/Radeon HD 7850, they're still very capable card, and can be gotten for cheap. My local LAN cafe was selling their stocks of GTX 660 for 30 each a few weeks ago when they upgraded to 1050.

Downside, as >>377957 said is that those are old flagship cards, and they run at flagship power requirement. If you don't have a beefy PSU you might not be able to power it.