DOOM3 with its engine, Id Tech4, is under 700k lines of code.
Entire Source engine, together with all Valve's Orange Box era games (Half-Life 2, Portal, TFT2 etc) is 4 million lines, according to leaks
Even if it's not added lines and just churn it's insane amount of waste.
Unless, of course, this is a case of inlining source code of dependencies, but I doubt it
@jullerino is an absolute monster.
3.7m lines of code.