Here is the full list of all 21 Lilith-M achievements worth 1,000 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox One.
Clear all levels in chapter 3 to get
Purchase 4 times in skin shop to get
Take elevator for 50 times to get
Been killed by punch for 50 times to get
Clear any level in chapter 3 to get
Been killed by laser for 50 times to get
Clear 15 levels perfectly to get
Clear chapter 2 to get
Clear 10 levels within the specified time to get
Been killed by man eater flower for 10 times to get
Been killed for 100 times to get
Been killed by spike for 50 times to get
Clear 5 levels perfectly to get
Been killed for 10 times in the same level to get
Change Lilith's skin for a time to get
Consume 100 gold coins to get
Purchase a skin to get
Disarm 20 traps to get
Been killed by man eater flower for 6 times to get
Collect 100 gold coins to get
Been killed for 1 time to get