Bit late to join in on this, but other games I play(ed) & recommend to ya lot.
FTL_
One of the best roguelites I've played, the music, the atomosphere, it all adds up perfectly. I highly recommend getting the captain's edition mod for this, it adds alot of gameplay, and alot of mechanics.
Dungeons of Dredmor_
Another one I haven't played in a while, however it fullfills the role of a classic roguelike game, and it has silly classes, like Bankster, Communist, Necroeconomist. I highly recommend getting it with all the DLC.
Nuclear Throne_
Topdown Shooter in Arcadelike style, meets roguelite & bullet hell elements. Lots of fun to be had, great learning curve.
The Binding of Isaac: Rebirth_
You play as a crying baby that mutates while trying to escape his mother. Pretty darn weird artisticly, great gameplay wise, deep physcologicaly. Heavily inspired by the old zelda game's dungeon style.
Risk of Rain_
I will just let this steam review speak for me here :
http://steamcommunity.com/id/ExplosiveO ... ed/248820/Undertale_
It's quite an emotional expirience, You have probary heard about it, as it has been quite poupular recently, and then the community went downhill. Nontheless the game it self very emotional and good, however it lacks replayability aside from the 3 different endings (Neutral, Pacifist, Genocide). I recommend it if you haven't watched any playthrus of it.
Terraria_
2d sandbox adventure, quite alot of fun, you build stuff, it looks cool, you fight stuff, you feel powerful or weak, you explore, you find dank
memes gear, alot of things to do.
League of Legends, & DotA 2_
MOBAs
I don't really recommend these, they are way to timeconsuming, but they work great as games to play with friends, unless you take the games too seriously. Kinda lame to play on your own.
Awesomenauts_
2d platformer moba, plays very differntly than other mobas, acctualy fun to play on your own.