Board Thread:General Discussion/@comment-36802211-20181001202312/@comment-32897163-20190115000030

the best contracts are the barret and luger contracts

theyre much more efficient than the 1k kills one

singleplayer is also not very good for hr's (except for grinding contracts)

i may sound a little biased because im rank 55 and singleplayer zombies just take too long to farm on their own to be worth

but these tips are solid for low-mid ranks and maybe new hrs