Here is the full list of all 15 Limited Rescue achievements.
Kill 3 enemies in the same round
Stay in the lava for at least 10 seconds straight
Pick up the ring 8 times in the same round
Steal a shield using the lifesteal missile
Have 4 missiles orbit around a tornado
Have 2 active protection effects
Survive until the ground is entirely covered in lava
Deflect 2 missiles with the same spell
Finish a game without having any bonus shields awarded to players
Win 4 medals
Hit 3 players with a meteorite
Hit 1 player with all the missiles of the Ice Cone
Take damage from 10 projectiles in a single round
Hit 2 players using 1 dash
Kill an enemy using the thunderbolt from far away