It is ebuild for TOME2 project. TOME2 is dead. Even TOME3 is dead already. Drop it.
TOME4 is currently one of most popular roguelikes and it should be in tree. Sadly currently it is quite hard to compile it on Gentoo. Binary packages are much more stable. I will provide tome4-bin ebuilds soon.
*** This bug has been marked as a duplicate of bug 387061 ***