Blood Suckers (NetEnt) - 98% RTP.

Starmania (NextGen) - 97.87% RTP.

Reel Rush (NetEnt) - 97% RTP.

Finn And The Swirly Spin (NetEnt) - 96.62% RTP.

Reactoonz (Play'n GO) - 96.51% RTP.

Jumanji. ...

Divine Fortune. ...

Ashoka. ...

Diamond Stars. ...

Blitz Joker. ...

Fishin' Frenzy. ...

Tomb of Ra. ...

Eye of Horus Megaways. No list of best games would be complete without at least one example of a Megaways slot.