Really, it is 'possible' to analyze EEG data in any software; most of the analysis is just basic math. However, there are open-source toolboxes in MATLAB and Python (e.g., EEGLAB, Fieldtrip, ERP PCA Toolkit, mne-python) that have already implemented most common tasks and will save you a lot of effort. R also has some stuff (e.g., I see an eegAnalysis package on CRAN) but I'm not sure how extensive it is.
There is a comprehensive guide by Nienke Meulman ( https://www.nienkemeulman.nl/materials) that shows how you can import the raw EEG files into R. You save the end-product as .rdat files I believe, but if you really wanted to you could probably also export them to .csv.
On the same website is also a tutorial on how to analyze this data, if you were to use the event related potential method.