To enter Cambodia for Indians, there are three visa options. The first one is Visa On Arrival. This is available at Phnom Penh International Airport and Seam Reap International Airport. If you're coming here by road, the Cambodia-Thailand Border, Cambodia-Vietnam Border and Cambodia-Laos Border offer checkpoints for your visa collection.
The second option is getting your visa online (eVisa), with the help of online payment through your credit card
The third option is applying at the Embassy of Cambodia and getting your visa stamped on your passport before departing
Laos, Malaysia, Philippines, Singapore, Vietnam, Thailand, Indonesia, Brunei Darussalam, Myanmar