Once upon a time Rolemaster was a drop in set of house rules for D&D. These monsters bring things full circle. These are the monsters from the D&D 5e SRD converted back to an approximation for any version of Rolemaster. Some monsters will be weaker than the official Rolemaster monsters for your version of Rolemaster. Some will be tougher. As a GM you should look at the monster and decide if you need to adjust the number encountered to take account of any variation in power.