These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] games-arcade/crack-attack-1.1.14-r2::gentoo  USE="-gtk -sdl" 783 KiB

Total: 1 package (1 new), Size of downloads: 783 KiB