The best replacement for calamity is manticore.

The best alternatives to calamity are rated as following:
★★★★★  manticore
★★★★★  windforce
★★★★  manticore diablo 3
★★★  disaster
★★★  danetta

Your alternative for calamity is not listed? Suggest!
Speaking about calamity, one probably shouldn't forget about serenity.

Other search terms related to calamity and their ratings are:
★★★★★ serenity
You have in mind a companion for calamity and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of calamity in all years. Click on graph for more.
calamity
manticore
windforce