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

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

[ebuild  N     ] acct-group/gamestat-0-r3::gentoo  0 KiB
[ebuild  N     ] games-arcade/xgalaga-2.1.1.0-r3::gentoo  324 KiB

Total: 2 packages (2 new), Size of downloads: 324 KiB